技术领域technical field
本发明属于建筑材料技术领域，具体涉及一种商砼废水湿磨制备低熟料水泥浆的方法。The invention belongs to the technical field of building materials, and in particular relates to a method for preparing low-clinker cement slurry by wet grinding commercial concrete wastewater.
背景技术Background technique
随着我国工业化和现代化的不断发展，为满足基础设施与城镇化建设的需要，每年生产建筑材料需要的消耗很大，生产水泥不仅需要大量的自然资源作为支持，而且还要排放大量CO2、烟尘、粉尘等颗粒物。现如今各领域正在以空前的速度和规模开发利用自然资源，能源短缺的现象已经逐渐出现。因此提高资源利用率，推动现有资源的重复利用，对于解决生态环境破坏，能源消耗严重具有重要意义。With the continuous development of China's industrialization and modernization, in order to meet the needs of infrastructure and urbanization, the annual consumption of building materials is very large. The production of cement not only requires a large amount of natural resources as support, but also emits a large amount of CO2 , Particles such as smoke and dust. Nowadays, various fields are developing and utilizing natural resources at an unprecedented speed and scale, and the phenomenon of energy shortage has gradually appeared. Therefore, improving the utilization rate of resources and promoting the reuse of existing resources is of great significance to solve the ecological environment damage and serious energy consumption.
低熟料水泥是指在胶凝材料中增加其他矿物混合材料的掺量，以降低水泥熟料的用量，使用合适的制备技术使其力学性能与耐久性能达到要求。低熟料水泥满足资源再利用与生态保护的要求，可以解决在建筑材料领域中的循环利用保护生态环境的问题。Low clinker cement refers to increasing the amount of other mineral mixed materials in the cementitious material to reduce the amount of cement clinker, and using appropriate preparation technology to make its mechanical properties and durability meet the requirements. Low clinker cement meets the requirements of resource reuse and ecological protection, and can solve the problem of recycling and protecting the ecological environment in the field of building materials.
商砼废水是在预拌混凝土生产过程中清洗混凝土搅拌机、运输车、泵车等产生的大量废水，其pH基本大于9。清洗需要消耗大量洁净水。矿渣是冶炼生铁时从高炉中排出的一种废渣，经水淬并磨细后形成磨细粒化高炉矿渣粉。磷石膏是指在磷酸生产中用硫酸处理磷矿时产生的固体废渣,其主要成分为二水硫酸钙，此外还含有异硫氰甲烷、3-甲氧基正戊烷、2-乙基-1等有机物杂质与可溶性磷、氟等杂质。电石渣是电石水解获取乙炔气后的以氢氧化钙为主要成分的废渣，利用电石渣可以代替石灰石制水泥、生产生石灰用作电石原料、生产化工产品、生产建筑材料及用于环境治理等。Commercial concrete wastewater is a large amount of wastewater produced by cleaning concrete mixers, transport vehicles, pump trucks, etc. during the production of ready-mixed concrete, and its pH is basically greater than 9. Cleaning requires the consumption of large amounts of clean water. Slag is a kind of waste slag discharged from the blast furnace when smelting pig iron. It is water-quenched and ground to form finely ground blast furnace slag powder. Phosphogypsum refers to the solid waste residue produced when sulfuric acid is used to treat phosphate rock in the production of phosphoric acid. Its main component is calcium sulfate dihydrate, and it also contains isothiocyanate, 3-methoxy-n-pentane, 1 and other organic impurities and soluble phosphorus, fluorine and other impurities. Calcium carbide slag is the waste residue with calcium hydroxide as the main component after the hydrolysis of calcium carbide to obtain acetylene gas. The use of calcium carbide slag can replace limestone to make cement, produce quicklime as calcium carbide raw material, produce chemical products, produce building materials and be used for environmental treatment.
湿磨方法是利用水作为介质对粉体颗粒进行球磨处理。在湿法粉磨过程中，水分的存在使粒子表面能降低，防止产生凝聚现象，也可使被粉碎颗粒的破坏强度降低，有利于粉碎过程的进行，得到粒径更小的粉体颗粒，有利于促进粉体颗粒在水化进程中更容易被水化产物包裹；在球磨过程中，因离子溶出使浆体材料呈碱性环境，其碱性大小接近于水泥浆料，使得材料颗粒表面由多聚体向低聚体转化，材料可“预水化”；同时将材料的粒径分布降低至微米级，使得不同尺度材料优化匹配，提高了原材料混合物拌和性能、均匀度、流变性能与稳定性。The wet milling method is to use water as the medium to perform ball milling on the powder particles. In the process of wet grinding, the presence of water reduces the surface energy of the particles, prevents aggregation, and reduces the destructive strength of the crushed particles, which is beneficial to the crushing process and obtains powder particles with smaller particle sizes. It is conducive to promoting the powder particles to be more easily wrapped by hydration products during the hydration process; during the ball milling process, the slurry material is in an alkaline environment due to ion dissolution, and its alkalinity is close to that of cement slurry, making the surface of the material particles The material can be "pre-hydrated" by converting from polymer to oligomer; at the same time, the particle size distribution of the material is reduced to the micron level, which optimizes the matching of different scale materials and improves the mixing performance, uniformity and rheological properties of the raw material mixture and stability.
国内已有利用矿渣、粉煤灰、磷渣、硅灰制备低熟料水泥的方法，如CN101948255B公布了一种低熟料用量、高折压比复合水泥的制备方法，由矿渣、硅灰或高钙粉煤灰、水泥熟料、低钙粉煤灰、炉渣或钢渣、尾矿、煤矸石或石灰石组成；CN106977122A公布了一种低熟料高磷渣水泥复合胶凝材料的制备方法，由水泥熟料、磷渣、偏高岭土、钢渣、粉煤灰、石灰石、石膏组成。Domestic existing method of utilizing slag, fly ash, phosphorus slag, silica fume to prepare low clinker cement, as CN101948255B announced a kind of preparation method of low clinker consumption, high folding ratio composite cement, by slag, silica fume or Composition of high-calcium fly ash, cement clinker, low-calcium fly ash, slag or steel slag, tailings, coal gangue or limestone; CN106977122A discloses a preparation method of a low-clinker high-phosphorus slag cement composite cementitious material, comprising Cement clinker, phosphorus slag, metakaolin, steel slag, fly ash, limestone, gypsum.
也有利用商砼废水的方法，如CN102512855公开了一种商砼搅拌站中的废水收集利用方法及装置，包括冲洗场、收集废水的主管或主沟、支管或支沟、至少一个沉淀池、多级连通管、阀门、水泵及储水罐。在冲洗场冲洗搅拌车后，废水通过漏水钢架流入支管或支沟，在主管或主沟处汇合后进入沉淀池，经过沉淀后的废水利用水泵通过出水管道进入储水罐，需要使用时，打开阀门，通过出水管道排出，和清水以一定配比调配用作混凝土拌合用水。但未有如何将商砼废水代替水制备水泥的方法。There are also methods for utilizing commercial concrete waste water. For example, CN102512855 discloses a method and device for collecting and utilizing waste water in a commercial concrete mixing station, including a flushing field, a main pipe or a main ditch for collecting waste water, a branch pipe or a branch ditch, at least one sedimentation tank, multiple Level connecting pipes, valves, water pumps and water storage tanks. After washing the mixer truck in the washing field, the waste water flows into the branch pipe or branch ditch through the leaking steel frame, and then enters the sedimentation tank after converging at the main pipe or the main ditch. The settled waste water enters the water storage tank through the outlet pipe through the water pump. Open the valve, discharge it through the outlet pipe, and mix it with clean water in a certain ratio for concrete mixing water. But there is no method how to prepare cement with commercial concrete waste water instead of water.
发明内容Contents of the invention
本发明的目的是针对上述现状，旨在提供一种利用商砼废水及工业固体废弃物为原料，生产成本低，力学性能符合要求基于湿磨工艺的低熟料水泥浆的制备方法。The purpose of the present invention is to aim at the above-mentioned present situation, aiming to provide a kind of use commercial concrete waste water and industrial solid waste as raw material, the production cost is low, the mechanical property meets the requirement and the preparation method of low-clinker cement slurry based on wet grinding process.
本发明目的的实现方式为，商砼废水湿磨制备低熟料水泥浆的方法，具体步骤如下：The way to achieve the object of the present invention is a method for preparing low-clinker cement slurry by wet grinding commercial concrete wastewater, and the specific steps are as follows:
1)取矿渣100份、减水剂0.13-0.8份按水固比0.5加商砼废水湿磨至平均粒径3-8μm，制成浆状料；1) Take 100 parts of slag, 0.13-0.8 parts of water-reducing agent, add commercial concrete waste water to wet grinding at a water-solid ratio of 0.5 to an average particle size of 3-8 μm, and make a slurry;
所述减水剂为聚羧酸系减水剂与聚丙烯酰胺按质量比7:3或9:1复配而成；The water reducer is made of polycarboxylate water reducer and polyacrylamide in a mass ratio of 7:3 or 9:1;
2)将步骤1)所得浆状料加消泡剂0.012-0.016份、电石渣10-25份、水泥熟料10-25份、经水处理的重量份数为2-5份的二水磷石膏按水固质量比0.35-0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；2) Add 0.012-0.016 parts of defoamer to the slurry material obtained in step 1), 10-25 parts of carbide slag, 10-25 parts of cement clinker, and 2-5 parts by weight of phosphorus dihydrate after water treatment Gypsum is added to commercial concrete waste water at a water-solid mass ratio of 0.35-0.5, mixed and stirred in a homogenizer to make slurry, and low-clinker cement slurry is obtained;
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本发明使用商砼废水替代水、加电石渣及湿磨工艺，通过球磨和浆体碱性的提高以激发矿渣的潜在活性，商砼废水中的固体起到水化产物的晶核诱导，降低粘度，提高和易性的作用，水中的钙离子起到补充钙相减少碳化；电石渣补充钙相生成钙硅比较高的水化硅酸钙，有一定渗透性，防止水化产物包裹未反应矿渣阻碍水化进程；加入二水磷石膏改善收缩性能，利用硫酸根和氢氧根的共同作用激发矿渣活性；加入消泡剂消除减水剂造成浆体含气量过多的不利影响。The present invention uses commercial concrete wastewater to replace water, electrified stone slag and wet grinding process, and stimulates the potential activity of slag through ball milling and slurry alkalinity, and the solid in commercial concrete wastewater acts as a crystal nucleus induction of hydration products, reducing Viscosity improves workability. Calcium ions in water supplement calcium phase to reduce carbonation; carbide slag supplements calcium phase to form calcium silicate hydrate with relatively high calcium-silicon ratio, which has certain permeability and prevents unreacted hydration products from wrapping The slag hinders the hydration process; the shrinkage performance is improved by adding phosphogypsum dihydrate, and the slag activity is stimulated by the combined action of sulfate and hydroxide; the defoamer is added to eliminate the adverse effects of excessive gas content in the slurry caused by the water reducer.
本发明制得的低熟料水泥浆利废率≥80％，3d抗压强度≥28MPa，28d抗压强度≥45MPa，3d抗折强度≥5MPa,28d抗折强度≥6.5MPa，1d膨胀率≥0％，28d收缩率≤0.6％，28d碳化深度≤1mm，不仅能降低水泥熟料用量，还能使矿渣，商砼废水等其它工业废料得到充分利用，节能减排。The waste rate of the low clinker cement slurry prepared by the present invention is ≥80%, 3d compressive strength ≥28MPa, 28d compressive strength ≥45MPa, 3d flexural strength ≥5MPa, 28d flexural strength ≥6.5MPa, 1d expansion rate ≥ 0%, 28d shrinkage rate ≤ 0.6%, 28d carbonization depth ≤ 1mm, not only can reduce the amount of cement clinker, but also make full use of slag, commercial concrete wastewater and other industrial waste, energy saving and emission reduction.
具体实施方式Detailed ways
本发明将矿渣、减水剂加商砼废水在湿磨机中混合研磨制成浆状料，浆状料与二水磷石膏、水泥熟料、电石渣、消泡剂及商砼废水在均料机中混合制得低熟料水泥浆，浆状料与二水磷石膏、水泥熟料、电石渣、消泡剂及商砼废水在均料机中混合制得低熟料水泥浆。The present invention mixes and grinds slag, water reducing agent and concrete waste water in a wet mill to make a slurry material, and the slurry material is mixed with phosphogypsum dihydrate, cement clinker, carbide slag, defoamer and commercial concrete waste water Low-clinker cement slurry is obtained by mixing in a feeder, and the slurry is mixed with phosphogypsum dihydrate, cement clinker, carbide slag, defoamer and commercial concrete wastewater in a homogenizer to obtain low-clinker cement slurry.
所用的商砼废水，8％≤固含≤12％，pH≥9。当固含小于8％时，商砼废水中未水化水泥微粉和细砂的数量不足以充分发挥晶核作用，无法有效吸引钙离子和羟基；当掺量大于12％时，会增大砂率，并产生更多的界面过渡区，影响硬化强度。本发明要求商砼废水pH≥9，当pH过小，浆体碱性不足，会对矿渣水化活性产生不利影响。The commercial concrete waste water used has a solid content of 8%≤12% and a pH≥9. When the solid content is less than 8%, the amount of unhydrated cement micropowder and fine sand in the commercial concrete wastewater is not enough to fully exert the crystal nucleation effect, and cannot effectively attract calcium ions and hydroxyl groups; when the content is greater than 12%, the amount of sand will increase. rate, and produce more interfacial transition zones, affecting hardening strength. The present invention requires that the commercial concrete wastewater has a pH ≥ 9, and when the pH is too low, the alkalinity of the slurry is insufficient, which will adversely affect the hydration activity of the slag.
所述减水剂为由武汉华轩科技股份有限公司生产的KH-5型聚羧酸系减水剂。KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比7:3或9:1复配而成；复配的KH-5型聚羧酸系减水剂中有效固含量为40％。The water reducer is a KH-5 polycarboxylate water reducer produced by Wuhan Huaxuan Technology Co., Ltd. KH-5 type polycarboxylate water reducer and polyacrylamide are compounded at a mass ratio of 7:3 or 9:1; the effective solid content of the compounded KH-5 type polycarboxylate water reducer is 40 %.
所用的矿渣由黑色冶金工业的工业废渣经湿磨后所得，所述矿渣碱性系数＞1，质量系数≥1.2，其平均粒径为3-8μm。The used slag is obtained from the industrial waste slag of the ferrous metallurgical industry after wet grinding, and the said slag has an alkalinity coefficient>1, a mass coefficient≥1.2, and an average particle size of 3-8μm.
所用的二水磷石膏是在磷酸生产中用硫酸处理磷矿时产生的固体废渣，其主要成分：CaSO4·2H2O，硫酸根与C-A-H(水化铝酸钙)结合产生钙矾石使灌浆材料达到微膨胀的效果。二水磷石膏用水预处理是用水洗，洗去异硫氰甲烷、3-甲氧基正戊烷、2-乙基-1等有机物杂质与可溶性磷、氟，经过水洗后的二水磷石膏pH值为5.0-6.5。所述二水磷石膏为硫酸钙。The dihydrate phosphogypsum used is the solid waste residue produced when sulfuric acid is used to treat phosphate rock in the production of phosphoric acid. Its main components are: CaSO4 2H2 O, and the combination of sulfate and CAH (calcium aluminate hydrate) produces ettringite. The grouting material achieves the effect of micro-expansion. The pretreatment of dihydrate phosphogypsum with water is washing with water to remove organic impurities such as isothiocyanate, 3-methoxy-n-pentane, 2-ethyl-1 and soluble phosphorus and fluorine. After washing, dihydrate phosphogypsum The pH is 5.0-6.5. The dihydrate phosphogypsum is calcium sulfate.
所用的水泥熟料为硅酸盐水泥熟料，比表面积≥350m2/kg；所用电石渣，比表面积≥950㎡/kg。The cement clinker used is Portland cement clinker with a specific surface area ≥ 350m2 /kg; the carbide slag used has a specific surface area ≥ 950m2/kg.
本发明利用商砼废水替代水，其作用是为湿磨矿渣的活性激发提供一定碱度，促进Si-O键断裂，破坏表面的玻璃体结构，进而OH-向内部扩散，促使矿渣分散溶解，此时矿渣中的SiO2与OH-等离子反应生成C-S-H凝胶。同时，在湿磨过程中，矿渣断裂的Si-O键在水中与水分子作用，Si键合OH-，O吸附H+，使矿渣玻璃体表面键合羟基，削弱相邻的Si-O键；而M(金属离子)-O键断裂后，M离子转入液相，在水中生成金属羟基络离子，增大胶凝材料的pH值，进一步促进Si-O键断裂，在矿渣粒子表面形成一层多孔的高硅膜，使粒子表面的聚合度降低，矿渣浆料在溶液中水化硬化。此时二水磷石膏的硫酸根在碱性环境下消耗溶液中的钙、铝离子生成水化硫铝酸钙，加速矿渣水化进程。矿渣潜在活性通过碱激活、机械激活和硫酸盐激活三重作用下得到激发。The present invention uses commercial concrete waste water to replace water, and its function is to provide a certain alkalinity for the activation of wet grinding slag, to promote the breakage of Si-O bonds, to destroy the glass body structure on the surface, and then to diffuseOH- to the inside to promote the dispersion and dissolution of slag. When SiO2 in slag reacts with OH- plasma to form CSH gel. At the same time, during the wet grinding process, the Si-O bond broken by the slag interacts with water molecules in water, Si bonds to OH- , and O adsorbs H+ , which makes the surface of the slag glass body bonded to hydroxyl and weakens the adjacent Si-O bond; After the M (metal ion)-O bond is broken, the M ion transfers into the liquid phase, generating metal hydroxyl complex ions in the water, increasing the pH value of the gelled material, further promoting the breaking of the Si-O bond, and forming a layer on the surface of the slag particles. A layer of porous high-silicon film reduces the degree of polymerization on the particle surface, and the slag slurry is hydrated and hardened in the solution. At this time, the sulfate radical of phosphogypsum dihydrate consumes calcium and aluminum ions in the solution in an alkaline environment to form calcium sulfoaluminate hydrate, which accelerates the hydration process of slag. The potential activity of slag is stimulated by the triple action of alkali activation, mechanical activation and sulfate activation.
商砼废水中存在未水化的水泥粉料和细砂，可以在胶凝材料的水化过程中充当晶核，为矿渣提供一个中心，在胶凝材料的水化过程中使钙离子和氢氧根吸附到晶核表面，加速C-S-H的形成。另一方面，未水化的水泥粉料和细砂可以起到微集料的作用，填充胶凝材料之间的孔隙，增加结构的密实度。同时，商砼废水中的固体可以起到“滚珠效应”，减少搅拌用水量，降低粘度，增加和易性。There are unhydrated cement powder and fine sand in commercial concrete wastewater, which can act as crystal nuclei in the hydration process of cementitious materials, provide a center for slag, and make calcium ions and hydrogen Oxygen radicals are adsorbed to the surface of the crystal nucleus to accelerate the formation of C-S-H. On the other hand, unhydrated cement powder and fine sand can act as micro-aggregates, filling the pores between cementitious materials and increasing the compactness of the structure. At the same time, the solids in commercial concrete wastewater can play a "ball effect", reducing the amount of water used for stirring, reducing viscosity, and increasing workability.
在搅拌时，商砼废水中已存在的水化硅酸钙会均匀地分布在水泥浆中，可以与矿渣和水泥新生成的水化硅酸钙建立良好的物理连接，使水化产物更加致密，提高硬化浆体强度。When stirring, the existing calcium silicate hydrate in the commercial concrete wastewater will be evenly distributed in the cement slurry, and a good physical connection can be established with the newly generated calcium silicate hydrate of the slag and cement, making the hydration product more compact , Improve the strength of hardened slurry.
商砼废水和电石渣中的钙离子可以提高水泥浆中钙相含量，在水化时生成钙硅比较高的水化硅酸钙，有一定渗透性，防止水化产物包裹未水化矿渣，水分可以较好地与其中未水化颗粒发生反应。Calcium ions in commercial concrete wastewater and calcium carbide slag can increase the calcium phase content in cement slurry, and generate calcium silicate hydrate with relatively high calcium-silicon ratio during hydration, which has certain permeability and prevents hydration products from wrapping unhydrated slag. Moisture can react well with the unhydrated particles therein.
下面用具体实施例详述本发明。The present invention is described in detail below with specific examples.
实施例1，Example 1,
1)取矿渣100份、减水剂0.8份按水固比0.5加商砼废水湿磨至平均粒径3μm，制成浆状料；1) Take 100 parts of slag and 0.8 parts of water-reducing agent according to the water-solid ratio of 0.5 and add concrete waste water to wet mill to an average particle size of 3 μm to make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比9:1复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide at a mass ratio of 9:1;
2)将步骤1)所得浆状料加消泡剂0.016份、电石渣25份、水泥熟料25份、经水处理的重量份数为5份的二水磷石膏按水固质量比0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入375份标准砂制得低熟料胶砂。2) Add 0.016 parts of defoamer to the slurry material obtained in step 1), 25 parts of carbide slag, 25 parts of cement clinker, and 5 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.5. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 375 parts of standard sand are added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为37.7Mpa，28d抗压强度为52.2Mpa，3d抗折强度与为5.5Mpa，28d抗折强度为6.8Mpa，1d膨胀率为0.001％，28d收缩率为0.061％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar obtained in this example is 37.7Mpa, the 28d compressive strength is 52.2Mpa, the 3d flexural strength is 5.5Mpa, the 28d flexural strength is 6.8Mpa, and the 1d expansion rate is 0.001% , 28d shrinkage rate of 0.061%, 28d carbonization depth ≤ 1mm.
实施例2，Example 2,
1)取矿渣100份、减水剂0.4份按水固比0.5加商砼废水湿磨至平均粒径5μm，制成浆状料；1) Take 100 parts of slag and 0.4 parts of water reducing agent and wet-grind commercial concrete waste water at a water-solid ratio of 0.5 to an average particle size of 5 μm to make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比7:3复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide in a mass ratio of 7:3;
2)将步骤1)所得浆状料加消泡剂0.013份、电石渣25份、水泥熟料25份、经水处理的重量份数为5份的二水磷石膏按水固质量比0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入375份标准砂制得低熟料胶砂。2) Add 0.013 parts of defoamer to the slurry material obtained in step 1), 25 parts of carbide slag, 25 parts of cement clinker, and 5 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.5. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 375 parts of standard sand are added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为34.3Mpa，28d抗压强度强度为49.6Mpa，3d抗折强度与为5.4Mpa，28d抗折强度为6.5Mpa，1d膨胀率为0.002％，28d收缩率为0.058％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar prepared in this example is 34.3Mpa, the 28d compressive strength is 49.6Mpa, the 3d flexural strength is 5.4Mpa, the 28d flexural strength is 6.5Mpa, and the 1d expansion rate is 0.002 %, 28d shrinkage rate is 0.058%, 28d carbonization depth ≤ 1mm.
实施例3，Example 3,
1)取矿渣100份、减水剂0.13份按水固比0.5加商砼废水湿磨至平均粒径8μm，制成浆状料；1) Take 100 parts of slag and 0.13 parts of water-reducing agent according to the water-solid ratio of 0.5, add commercial concrete waste water to wet mill to an average particle size of 8 μm, and make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比9:1复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide at a mass ratio of 9:1;
2)将步骤1)所得浆状料加消泡剂0.012份、电石渣25份、水泥熟料25份、经水处理的重量份数为5份的二水磷石膏按水固质量比0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入375份标准砂制得低熟料胶砂。2) Add 0.012 parts of defoamer to the slurry material obtained in step 1), 25 parts of carbide slag, 25 parts of cement clinker, and 5 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.5. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 375 parts of standard sand are added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为30.9Mpa，28d抗压强度为48.4Mpa，3d抗折强度与为5.2Mpa，28d抗折强度为6.6Mpa，1d膨胀率为0.002％，28d收缩率为0.056％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar prepared in this example is 30.9Mpa, the 28d compressive strength is 48.4Mpa, the 3d flexural strength is 5.2Mpa, the 28d flexural strength is 6.6Mpa, and the 1d expansion rate is 0.002% , 28d shrinkage rate of 0.056%, 28d carbonization depth ≤ 1mm.
实施例4，Example 4,
1)取矿渣100份、减水剂0.13份按水固比0.5加商砼废水湿磨至平均粒径8μm，制成浆状料；1) Take 100 parts of slag and 0.13 parts of water-reducing agent according to the water-solid ratio of 0.5, add commercial concrete waste water to wet mill to an average particle size of 8 μm, and make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比7:3复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide in a mass ratio of 7:3;
2)将步骤1)所得浆状料与消泡剂0.012份、电石渣10份、水泥熟料10份、经水处理的重量份数为2份的二水磷石膏按水固质量比0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆，再加入330份标准砂制得低熟料胶砂。2) Add the slurry material obtained in step 1) with 0.012 parts of defoamer, 10 parts of carbide slag, 10 parts of cement clinker, and 2 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.5. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry, and then 330 parts of standard sand is added to make a low-clinker mortar.
本实施例制得的低熟料胶砂3d抗压强度为28.5Mpa，28d抗压强度为47.0Mpa，3d抗折强度与为5.2Mpa，28d抗折强度为6.6Mpa，1d膨胀率为0.001％，28d收缩率为0.071％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar prepared in this example is 28.5Mpa, the 28d compressive strength is 47.0Mpa, the 3d flexural strength is 5.2Mpa, the 28d flexural strength is 6.6Mpa, and the 1d expansion rate is 0.001% , 28d shrinkage rate of 0.071%, 28d carbonization depth ≤ 1mm.
实施例5，Example 5,
1)取矿渣100份、减水剂0.8份按水固比0.5加商砼废水湿磨至平均粒径3μm，制成浆状料；1) Take 100 parts of slag and 0.8 parts of water-reducing agent according to the water-solid ratio of 0.5 and add concrete waste water to wet mill to an average particle size of 3 μm to make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比9:1复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide at a mass ratio of 9:1;
2)将步骤1)所得浆状料加消泡剂0.015份、电石渣15份、水泥熟料20份、经水处理的重量份数为5份的二水磷石膏按水固质量比0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入360份标准砂制得低熟料胶砂。2) Add 0.015 parts of defoamer to the slurry material obtained in step 1), 15 parts of carbide slag, 20 parts of cement clinker, and 5 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.5. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 360 parts of standard sand is added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为33.6Mpa，28d抗压强度为50.8Mpa，3d抗折强度与为5.4Mpa，28d抗折强度为6.8Mpa，1d膨胀率为0.002％，28d收缩率为0.062％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar obtained in this example is 33.6Mpa, the 28d compressive strength is 50.8Mpa, the 3d flexural strength is 5.4Mpa, the 28d flexural strength is 6.8Mpa, and the 1d expansion rate is 0.002% , 28d shrinkage rate of 0.062%, 28d carbonization depth ≤ 1mm.
实施例6，Example 6,
1)取矿渣100份、减水剂0.4份按水固比0.5加商砼废水湿磨至平均粒径5μm，制成浆状料；1) Take 100 parts of slag and 0.4 parts of water reducing agent and wet-grind commercial concrete waste water at a water-solid ratio of 0.5 to an average particle size of 5 μm to make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比7:3复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide in a mass ratio of 7:3;
2)将步骤1)所得浆状料加消泡剂0.012份、电石渣15份、水泥熟料10份、经水处理的重量份数为3份的二水磷石膏按水固质量比0.5加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入375份标准砂制得低熟料胶砂。2) Add 0.012 parts of defoamer to the slurry material obtained in step 1), 15 parts of carbide slag, 10 parts of cement clinker, and 3 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.5. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 375 parts of standard sand are added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为29.2Mpa，28d抗压强度为49.8Mpa，3d抗折强度与为5.1Mpa，28d抗折强度为6.5Mpa，1d膨胀率为0.001％，28d收缩率为0.071％，28d碳化深度为≤1mm。The 3d compressive strength of the low clinker mortar obtained in this example is 29.2Mpa, the 28d compressive strength is 49.8Mpa, the 3d flexural strength is 5.1Mpa, the 28d flexural strength is 6.5Mpa, and the 1d expansion rate is 0.001% , The 28d shrinkage rate is 0.071%, and the 28d carbonization depth is ≤1mm.
实施例7，Example 7,
1)取矿渣100份、减水剂0.8份按水固比0.5加商砼废水湿磨至平均粒径3μm，制成浆状料；1) Take 100 parts of slag and 0.8 parts of water-reducing agent according to the water-solid ratio of 0.5 and add concrete waste water to wet mill to an average particle size of 3 μm to make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比9:1复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide at a mass ratio of 9:1;
2)将步骤1)所得浆状料加消泡剂0.016份、电石渣25份、水泥熟料25份、经水处理的重量份数为5份的二水磷石膏按水固质量比0.35加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入375份标准砂制得低熟料胶砂。2) Add 0.016 parts of defoamer to the slurry material obtained in step 1), 25 parts of carbide slag, 25 parts of cement clinker, and 5 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.35. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 375 parts of standard sand are added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为47Mpa，28d抗压强度为65.8Mpa，3d抗折强度与为7.9Mpa，28d抗折强度为9.8Mpa，1d膨胀率为0.001％，28d收缩率为0.072％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar obtained in this embodiment is 47Mpa, the 28d compressive strength is 65.8Mpa, the 3d flexural strength is 7.9Mpa, the 28d flexural strength is 9.8Mpa, and the 1d expansion rate is 0.001%. The 28d shrinkage rate is 0.072%, and the 28d carbonization depth is less than or equal to 1mm.
实施例8，Example 8,
1)取矿渣100份、减水剂0.13份按水固比0.5加商砼废水湿磨至平均粒径3μm，制成浆状料；1) Take 100 parts of slag and 0.13 parts of water-reducing agent according to the water-solid ratio of 0.5, add commercial concrete waste water to wet mill to an average particle size of 3 μm, and make a slurry;
所述减水剂为KH-5型聚羧酸系减水剂与聚丙烯酰胺按质量比9:1复配而成；The water reducer is compounded by KH-5 polycarboxylate water reducer and polyacrylamide at a mass ratio of 9:1;
2)将步骤1)所得浆状料加消泡剂0.012份、电石渣25份、水泥熟料25份、经水处理的重量份数为5份的二水磷石膏按水固质量比0.35加商砼废水，于均料机中混合搅拌制浆，制得低熟料水泥浆；再加入375份标准砂制得低熟料胶砂。2) Add 0.012 parts of defoamer to the slurry material obtained in step 1), 25 parts of carbide slag, 25 parts of cement clinker, and 5 parts by weight of water-treated phosphogypsum at a water-solid mass ratio of 0.35. Commercial concrete waste water is mixed and stirred in a homogenizer to make a low-clinker cement slurry; then 375 parts of standard sand are added to make a low-clinker mortar.
所述消泡剂为B-346减水型消泡剂。The defoamer is B-346 water-reducing defoamer.
本实施例制得的低熟料胶砂3d抗压强度为39.9Mpa，28d抗压强度为60.9Mpa，3d抗折强度与为7Mpa，28d抗折强度为9.3Mpa，1d膨胀率为0.002％，28d收缩率为0.069％，28d碳化深度≤1mm。The 3d compressive strength of the low clinker mortar prepared in this embodiment is 39.9Mpa, the 28d compressive strength is 60.9Mpa, the 3d flexural strength is 7Mpa, the 28d flexural strength is 9.3Mpa, and the 1d expansion rate is 0.002%. The 28d shrinkage rate is 0.069%, and the 28d carbonization depth is ≤1mm.
| Application Number | Priority Date | Filing Date | Title |
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| CN201810069679.8ACN108298929A (en) | 2018-01-24 | 2018-01-24 | The method that quotient's concrete waste water wet-milling prepares low-clinker cement slurry |
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| CN110304848A (en)* | 2019-04-11 | 2019-10-08 | 武汉理工大学 | A kind of super gel material based on wet grinding process and its preparation method and application |
| CN110330257A (en)* | 2019-04-11 | 2019-10-15 | 武汉理工大学 | A kind of C-S-H gel nanocrystal early strength agent and its preparation method and application |
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| CN112253145A (en)* | 2020-09-07 | 2021-01-22 | 河南城建学院 | Preparation method of sewage slurry for slurry balance shield and shield construction method |
| CN114315185A (en)* | 2022-01-05 | 2022-04-12 | 武汉理工大学 | Carbide slag-based carbide hardened body material and preparation method and application thereof |
| CN116730641A (en)* | 2023-05-19 | 2023-09-12 | 华新水泥股份有限公司 | A method for preparing enhanced bio-based lightweight aggregate |
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