技术领域technical field
本发明属于建筑材料领域，具体涉及一种硫铝酸盐水泥基自流平砂浆及其制备方法。The invention belongs to the field of building materials, and in particular relates to a sulphoaluminate cement-based self-leveling mortar and a preparation method thereof.
背景技术Background technique
水泥基自流平砂浆又称自流平地坪砂浆，可作为结构材料用于改善地面缺陷与地面修补，使用时，加水搅拌成浆状后具有极好的流动性，可采用泵送浇注，稍经摊铺即可自动找平形成光滑表面。因水泥基自流平砂浆具有优异的流动性，可在自身重力下形成光滑平面，加上早后期力学强度良好、界面粘结性好等特点可实现快速养护施工、减轻施工强度，具有良好的社会经济效益。与环氧树脂等有机类地坪材料相比，无机类地坪砂浆具有无污染、成本相对廉价、耐久性良好等特点；与石膏基自流平砂浆相比，水泥基自流平砂浆具有更好的耐水性、耐磨性与抗腐蚀、抗冲刷能力。Cement-based self-leveling mortar, also known as self-leveling floor mortar, can be used as a structural material to improve ground defects and ground repairs. When in use, it has excellent fluidity after being mixed with water and can be poured by pumping. It can be automatically leveled to form a smooth surface after paving. Due to the excellent fluidity of cement-based self-leveling mortar, it can form a smooth plane under its own gravity, coupled with the characteristics of good mechanical strength in the early and late stages, and good interface adhesion, it can realize rapid maintenance construction and reduce construction strength. It has a good social economic benefits. Compared with organic floor materials such as epoxy resin, inorganic floor mortar has the characteristics of no pollution, relatively cheap cost, and good durability; compared with gypsum-based self-leveling mortar, cement-based self-leveling mortar has better Water resistance, abrasion resistance, corrosion resistance and erosion resistance.
目前水泥基自流平砂浆的主要应用障碍及关键性问题为：尽管水泥基自流平砂浆得到了较大的关注并取得了一部分应用效果，但现行的水泥基自流平砂浆仍存在较差的表面质量、外加剂之间的配伍作用及其与胶凝材料的适应性问题以及早期强度较低造成的施工时间延长等缺陷。此外，以纤维素醚作为自流平砂浆的主要增稠剂，其在改善砂浆离析泌水同时，存在引进气泡及对砂浆力学强度的负面影响较大等问题。At present, the main application obstacles and key problems of cement-based self-leveling mortar are: although cement-based self-leveling mortar has received great attention and achieved some application effects, the current cement-based self-leveling mortar still has poor surface quality , Compatibility between admixtures and its adaptability to cementitious materials, as well as defects such as prolonged construction time caused by low early strength. In addition, using cellulose ether as the main thickener of self-leveling mortar, while improving the segregation and bleeding of the mortar, there are problems such as the introduction of air bubbles and a relatively large negative impact on the mechanical strength of the mortar.
中国专利CN102826814B公开了一种水泥基自流平砂浆的方法，所用胶凝材料中硫铝酸盐水泥占总胶凝材料比例相对较小，约为20-30％，对早期强度增进较小，且配比下灰砂比较高，约为1.0-1.2，即胶凝材料用量较大，制备成本相对较高；中国专利CN102826814B公开了水泥基自流平砂浆的一种制备方法，其所用胶凝材料为快硬硫铝酸盐水泥，半水石膏作为辅助胶凝材料，但是该制备材料中所用石英砂成本约为普通河砂的5-10倍，且以单一硫铝酸盐水泥为主要胶凝体系，存在早期水化放热量大、后期强度增进较少等缺点。Chinese patent CN102826814B discloses a method for cement-based self-leveling mortar. Among the cementitious materials used, the proportion of sulfoaluminate cement in the total cementitious material is relatively small, about 20-30%, which has a small increase in early strength, and The proportion of lime sand is relatively high, about 1.0-1.2, that is, the amount of cementitious material is relatively large, and the preparation cost is relatively high; Chinese patent CN102826814B discloses a preparation method of cement-based self-leveling mortar, and the cementitious material used is Rapid hardening sulphoaluminate cement and hemihydrate gypsum are used as auxiliary cementitious materials, but the cost of quartz sand used in this preparation material is about 5-10 times that of ordinary river sand, and single sulphoaluminate cement is used as the main cementitious system , there are disadvantages such as large heat release in the early stage of hydration and less strength increase in the later stage.
发明内容Contents of the invention
本发明所要解决的技术问题是针对上述现有技术存在的不足而提供一种硫铝酸盐水泥基自流平砂浆及其制备方法，该自流平砂浆具有低灰砂比、快硬早强、高匀质性与流动性、无离析泌水等优良工作及力学性能。The technical problem to be solved by the present invention is to provide a sulphoaluminate cement-based self-leveling mortar and its preparation method in view of the deficiencies in the above-mentioned prior art. The self-leveling mortar has low lime-sand ratio, rapid hardening and early strength, high Excellent working and mechanical properties such as homogeneity and fluidity, no segregation and bleeding.
本发明为解决上述提出的问题所采用的技术方案为：The technical scheme that the present invention adopts for solving the above-mentioned problem is:
一种硫铝酸盐水泥基自流平砂浆，其原材料中除水以外包括以下重量份的材料组成：10-20份普通硅酸盐水泥，15-25份硫铝酸盐水泥，4-8份天然石膏，细集料天然河砂35-50份，填料重钙粉10-25份，减水剂0.20-0.40份，缓凝剂0.10-0.20份，早强剂0.05-0.02份，乳胶粉0.40-0.80份，增稠剂0.01-0.04份。A sulphoaluminate cement-based self-leveling mortar, the raw materials of which include water in addition to the following materials in parts by weight: 10-20 parts of ordinary Portland cement, 15-25 parts of sulphoaluminate cement, 4-8 parts Natural gypsum, fine aggregate natural river sand 35-50 parts, filler heavy calcium powder 10-25 parts, water reducing agent 0.20-0.40 parts, retarder 0.10-0.20 parts, early strength agent 0.05-0.02 parts, latex powder 0.40 parts -0.80 parts, thickener 0.01-0.04 parts.
优选地，该硫铝酸盐水泥基自流平砂浆，其原材料中除水以外包括以下重量份的材料组成：11-17份普通硅酸盐水泥，17-23份硫铝酸盐水泥，6份天然石膏，细集料天然河砂36-48份，填料重钙粉12-24份，减水剂0.24-0.40份，缓凝剂0.12-0.20份，早强剂0.08-0.16份，乳胶粉0.40-0.80份，增稠剂0.012-0.032份。Preferably, the sulphoaluminate cement-based self-leveling mortar comprises the following materials by weight in addition to water: 11-17 parts of ordinary Portland cement, 17-23 parts of sulphoaluminate cement, 6 parts Natural gypsum, fine aggregate natural river sand 36-48 parts, filler heavy calcium powder 12-24 parts, water reducing agent 0.24-0.40 parts, retarder 0.12-0.20 parts, early strength agent 0.08-0.16 parts, latex powder 0.40 parts -0.80 parts, thickener 0.012-0.032 parts.
按上述方案，增稠剂种类为温轮胶，是一种由产碱杆菌以淀粉等碳水化合物为主要原料经有氧深层发酵所得的可再生微生物多糖，通过自身良好的增稠亲水作用能较好地改善自流平砂浆的结构匀质性与砂浆离析泌水的工作性能。According to the above scheme, the type of thickener is Wenlun gum, which is a renewable microbial polysaccharide obtained by aerobic submerged fermentation of carbohydrates such as starch by Bacillus alcaligenes. It can better improve the structural homogeneity of self-leveling mortar and the work performance of mortar segregation and bleeding.
按上述方案，所述硫铝酸盐水泥基自流平砂浆的水灰比为0.45-0.50，灰砂比控制在0.7以下。According to the above scheme, the water-cement ratio of the sulfoaluminate cement-based self-leveling mortar is 0.45-0.50, and the lime-sand ratio is controlled below 0.7.
按上述方案，所述普通硅酸盐水泥及硫铝酸盐水泥强度等级标号均≥42.5级。According to the above scheme, the strength grades of the ordinary Portland cement and the sulphoaluminate cement are all ≥42.5 grades.
按上述方案，所述天然石膏主要组分为无水石膏，其中CaSO4的含量≥90％。According to the above scheme, the main component of the natural gypsum is anhydrite, wherein the content of CaSO4 is ≥90%.
按上述方案，所述细集料为天然河砂，最大粒径≤0.6mm。According to the above scheme, the fine aggregate is natural river sand with a maximum particle size of ≤0.6mm.
按上述方案，所述填料为重钙粉，有效成分碳酸钙含量≥95％。According to the above scheme, the filler is heavy calcium powder, and the active ingredient calcium carbonate content is more than or equal to 95%.
按上述方案，所述减水剂为聚羧酸类高效减水剂的一种，缓凝剂为柠檬酸钠，早强剂为碳酸锂；乳胶粉为可分散性乳胶粉。According to the above scheme, the water reducer is a kind of polycarboxylic acid high-efficiency water reducer, the retarder is sodium citrate, the early strength agent is lithium carbonate; the latex powder is dispersible latex powder.
本发明所述硫铝酸盐水泥基自流平砂浆的制备方法，步骤如下：The preparation method of sulphoaluminate cement-based self-leveling mortar of the present invention, the steps are as follows:
1)按本发明上述配比称量各原材料的干料，干混充分；1) Weigh the dry material of each raw material according to the above-mentioned proportioning ratio of the present invention, and dry mix fully;
2)按设定水灰比称量用水量，再将干混后各材料倒入搅拌容器中，搅拌程序为：在低速(100-150r/min)下慢搅50-70s后，将粘附在壁内粉料刮入料浆中，再快搅(500-1000r/min)150-200s后即可。2) Weigh the amount of water according to the set water-cement ratio, and then pour the materials after dry mixing into the mixing container. Scrape the powder into the slurry in the wall, and then stir (500-1000r/min) for 150-200s.
本发明的主要技术构思如下：旨在于提高水泥基自流平砂浆的早期力学强度与改善砂浆材料的匀质性，本发明在设计中采用早期强度较高的硫铝酸盐水泥作为胶凝材料之一，并使其占胶凝材料总质量比例≥50％；同时，为改善自流平砂浆的匀质性，本发明采用多糖化合物温轮胶为体系增稠剂，这是因为与纤维素醚类的增稠剂相比，温轮胶的掺量更少，改善砂浆匀质性效果更好且不会带来引气、降低砂浆强度等不良工作性状及力学性能影响；例外，在保证水泥基砂浆性能要求的前提下，将体系灰砂比降至0.7以下，以降低体系胶凝材料用量，从而降低砂浆制备成本。The main technical idea of the present invention is as follows: aiming at improving the early mechanical strength of cement-based self-leveling mortar and improving the homogeneity of the mortar material, the present invention adopts sulphoaluminate cement with higher early strength as the cementitious material in the design 1. Make it account for more than 50% of the total mass of the cementitious material; at the same time, in order to improve the homogeneity of the self-leveling mortar, the present invention uses the polysaccharide compound Wenlun glue as the system thickener, because it is compatible with cellulose ethers Compared with other thickeners, the amount of Wenlun rubber is less, and the effect of improving the homogeneity of the mortar is better, and it will not bring about adverse working properties and mechanical properties such as air-entrainment and lower mortar strength; On the premise of meeting the performance requirements of the mortar, the lime-sand ratio of the system is reduced to less than 0.7, so as to reduce the amount of cementitious materials in the system, thereby reducing the cost of mortar preparation.
与现有技术相比，本发明的有益效果及自流平砂浆性能指标：Compared with the prior art, the beneficial effect of the present invention and the performance index of self-leveling mortar:
1)有益效果：本发明提供的硫铝酸盐水泥基自流平砂浆具有较低的灰砂比，胶凝材料占比用量小，成本低廉，与目前自流平砂浆行业指导价1500-2000元/吨相比，该发明产品成本约为550元/吨，且制备工艺步骤简单，施工快捷高效，能降低工人劳动强度及提高劳动生产率；以温轮胶为增稠剂改善砂浆的离析泌水现象显著，且对砂浆工作性及力学性能负面影响较小，性能良好；1) Beneficial effects: the sulphoaluminate cement-based self-leveling mortar provided by the present invention has a relatively low lime-sand ratio, the proportion of cementitious materials is small, and the cost is low, compared with the current self-leveling mortar industry guide price of 1500-2000 yuan/ Compared with tons, the product cost of this invention is about 550 yuan/ton, and the preparation process steps are simple, the construction is fast and efficient, can reduce the labor intensity of workers and improve labor productivity; use Wenlun glue as a thickener to improve the segregation and bleeding of mortar Significant, and has little negative impact on mortar workability and mechanical properties, and has good performance;
2)砂浆性能：本发明所述自流平砂浆性能测试方法按建材标准JC/T 985-2005地面用自流平砂浆进行，性能参数值为初始流动度值≥145mm，20min后流动度≥148mm；1d抗折及抗压强度波动范围分别≥5.5MPa与≥16.0MPa，28d抗折及抗压强度波动范围分别≥9.0MPa与≥29.0MPa；14d及28d界面粘结强度波动范围分别≥1.0MPa与≥1.140MPa；观察砂浆工作性状均无离析泌水现象，抗冲击性均达标。2) Mortar performance: The self-leveling mortar performance test method of the present invention is carried out according to the building material standard JC/T 985-2005 self-leveling mortar for the ground, and the performance parameter value is an initial fluidity value ≥ 145mm, and the fluidity ≥ 148mm after 20 minutes; 1d The fluctuation range of flexural and compressive strength is ≥5.5MPa and ≥16.0MPa respectively, the fluctuation range of flexural and compressive strength of 28d is ≥9.0MPa and ≥29.0MPa respectively; the fluctuation range of interface bond strength of 14d and 28d is ≥1.0MPa and ≥ 1.140MPa; no segregation bleeding phenomenon was observed in the working properties of the mortar, and the impact resistance was up to the standard.
具体实施方式Detailed ways
为了更好地理解本发明，下面结合实施例进一步阐明本发明的内容，但本发明不仅仅局限于下面的实施例。In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the present invention is not limited to the following examples.
下述实施例中，普通硅酸盐水泥及硫铝酸盐水泥强度等级标号均为42.5级；天然石膏主要组分为无水石膏，其中CaSO4的质量分数≥90％；细集料为天然河砂，最大粒径≤0.6mm；填料为重钙粉，有效成分碳酸钙含量≥95％；减水剂为聚羧酸类高效减水剂；缓凝剂为柠檬酸钠；早强剂为碳酸锂；乳胶粉为可分散性乳胶粉，型号为瓦克5044N；增稠剂为温轮胶。In the following examples, the strength grades of ordinary Portland cement and sulphoaluminate cement are both grade 42.5; the main component of natural gypsum is anhydrite, wherein the mass fraction of CaSO4 is ≥ 90%; the fine aggregate is natural River sand, the maximum particle size is ≤0.6mm; the filler is heavy calcium powder, and the active ingredient calcium carbonate content is ≥95%; the water reducing agent is polycarboxylate superplasticizer; the retarder is sodium citrate; Lithium carbonate; the latex powder is dispersible latex powder, the model is Wacker 5044N; the thickener is Wenlun rubber.
实施例1Example 1
一种硫铝酸盐水泥基自流平砂浆，制备该砂浆的原材料中除水以外包括以下重量份的材料组成：11份普通硅酸盐水泥，23份硫铝酸盐水泥，6份天然石膏，细集料天然河砂48份，填料重钙粉12份，减水剂0.24份，缓凝剂0.12份，早强剂0.12份，乳胶粉0.40份，增稠剂0.032份。A sulphoaluminate cement-based self-leveling mortar, the raw materials for preparing the mortar include the following materials by weight in addition to water: 11 parts of ordinary Portland cement, 23 parts of sulphoaluminate cement, 6 parts of natural gypsum, 48 parts of natural river sand for fine aggregate, 12 parts of heavy calcium powder for filler, 0.24 part of water reducer, 0.12 part of retarder, 0.12 part of early strength agent, 0.40 part of latex powder, and 0.032 part of thickener.
上述硫铝酸盐水泥基自流平砂浆的具体制备方法如下：The specific preparation method of the above-mentioned sulfoaluminate cement-based self-leveling mortar is as follows:
将上述原材料按配比称量好，干混充分；按设定水灰比称量用水量，再将干混后各材料倒入搅拌容器中，搅拌程序为：在低速(100-150r/min)下慢搅50-70s后，将粘附在壁内粉料刮入料浆中，再快搅(500-1000r/min)150-200s后即可。Weigh the above-mentioned raw materials according to the ratio, and dry-mix fully; weigh the water according to the set water-cement ratio, and then pour the dry-mixed materials into the mixing container. The mixing procedure is: at low speed (100-150r/min) After stirring slowly for 50-70s, scrape the powder adhered to the wall into the slurry, and then stir quickly (500-1000r/min) for 150-200s.
分别测试本实施例所得硫铝酸盐水泥基自流平砂浆的初始及20min后流动度、1d/28d砂浆抗折抗压强度、14d/28d粘结强度、抗冲击性，并观察砂浆制备后的表面工作性状，并与建材标准JC/T 985-2005对比，具体结果见附表1中样品1。Test the initial and 20min fluidity, 1d/28d mortar flexural compressive strength, 14d/28d bond strength, and impact resistance of the sulphoaluminate cement-based self-leveling mortar obtained in this example, and observe the mortar after preparation. Surface working properties, and compared with the building material standard JC/T 985-2005, the specific results are shown in sample 1 in attached table 1.
由表1可知，所得硫铝酸盐水泥基自流平砂浆匀质性良好、无离析泌水现象，且与建材标准JC/T 985-2005相比，1d抗折强度与抗压强度分别为6.8MPa与16.27MPa，明显高于标准中的2.0MPa与6.0MPa要求，界面粘结强度值在14d时已经达到标准要求的1.0MPa，抗冲击等指标均达标。It can be seen from Table 1 that the obtained sulphoaluminate cement-based self-leveling mortar has good homogeneity and no segregation and bleeding phenomenon, and compared with the building material standard JC/T 985-2005, the 1d flexural strength and compressive strength are 6.8 MPa and 16.27MPa are significantly higher than the standard requirements of 2.0MPa and 6.0MPa. The interface bond strength value has reached the standard requirement of 1.0MPa at 14 days, and the impact resistance and other indicators are all up to standard.
实施例2Example 2
一种硫铝酸盐水泥基自流平砂浆，制备该砂浆的原材料中除水以外包包括以下重量份的材料组成：17份普通硅酸盐水泥，17份硫铝酸盐水泥，6份天然石膏，细集料天然河砂48份，填料重钙粉12份，减水剂0.24份，缓凝剂0.16份，早强剂0.12份，乳胶粉0.40份，增稠剂0.024份。A sulphoaluminate cement-based self-leveling mortar, the raw material for preparing the mortar includes the following materials by weight in addition to water: 17 parts of ordinary Portland cement, 17 parts of sulphoaluminate cement, and 6 parts of natural gypsum , 48 parts of fine aggregate natural river sand, 12 parts of heavy calcium powder for filler, 0.24 part of water reducer, 0.16 part of retarder, 0.12 part of early strength agent, 0.40 part of latex powder, and 0.024 part of thickener.
采用与实施例1相同的方法及水灰比制备自流平砂浆，采用与实施例1相同的测试方法测试砂浆性能参数，具体结果见附表1中样品2。The self-leveling mortar was prepared by the same method and water-cement ratio as in Example 1, and the performance parameters of the mortar were tested by the same test method as in Example 1. For specific results, see Sample 2 in Attached Table 1.
由表1可知，所得硫铝酸盐水泥基自流平砂浆匀质性良好、无离析泌水现象，且与建材标准JC/T 985-2005相比，1d抗折强度与抗压强度分别为7.30MPa与17.40MPa，明显高于标准中的2.0MPa与6.0MPa要求，界面粘结强度值在14d时已经达到标准要求的1.0MPa，抗冲击等指标均达标。It can be seen from Table 1 that the obtained sulphoaluminate cement-based self-leveling mortar has good homogeneity and no segregation and bleeding phenomenon, and compared with the building material standard JC/T 985-2005, the 1d flexural strength and compressive strength are 7.30 MPa and 17.40MPa are significantly higher than the standard requirements of 2.0MPa and 6.0MPa. The interface bond strength value has reached the standard requirement of 1.0MPa at 14 days, and the impact resistance and other indicators are all up to standard.
实施例3Example 3
一种硫铝酸盐水泥基自流平砂浆，制备该砂浆的原材料中除水以外包包括以下重量份的材料组成：17份普通硅酸盐水泥，17份硫铝酸盐水泥，6份天然石膏，细集料天然河砂36份，填料重钙粉24份，减水剂0.24份，缓凝剂0.16份，早强剂0.12份，乳胶粉0.40份，增稠剂0.012份。A sulphoaluminate cement-based self-leveling mortar, the raw material for preparing the mortar includes the following materials by weight in addition to water: 17 parts of ordinary Portland cement, 17 parts of sulphoaluminate cement, and 6 parts of natural gypsum , 36 parts of fine aggregate natural river sand, 24 parts of heavy calcium powder for filler, 0.24 part of water reducer, 0.16 part of retarder, 0.12 part of early strength agent, 0.40 part of latex powder, and 0.012 part of thickener.
采用与实施例1相同的方法及水灰比制备自流平砂浆，采用与实施例1相同的测试方法测试砂浆性能参数，具体结果见附表1中样品3。The self-leveling mortar was prepared by the same method and water-cement ratio as in Example 1, and the performance parameters of the mortar were tested by the same test method as in Example 1. See sample 3 in Attached Table 1 for specific results.
由表1可知，所得硫铝酸盐水泥基自流平砂浆匀质性良好、无离析泌水现象，且与建材标准JC/T 985-2005相比，1d抗折强度与抗压强度分别为5.57MPa与16.45MPa，明显高于标准中的2.0MPa与6.0MPa要求，界面粘结强度值在14d时已经达到标准要求的1.0MPa，抗冲击等指标均达标。It can be seen from Table 1 that the obtained sulphoaluminate cement-based self-leveling mortar has good homogeneity and no segregation bleeding phenomenon, and compared with the building material standard JC/T 985-2005, the 1d flexural strength and compressive strength are 5.57 MPa and 16.45MPa are significantly higher than the standard requirements of 2.0MPa and 6.0MPa. The interface bond strength value has reached the standard requirement of 1.0MPa at 14 days, and the impact resistance and other indicators are all up to standard.
实施例4Example 4
一种硫铝酸盐水泥基自流平砂浆，制备该砂浆的原材料中除水以外包包括以下重量份的材料组成：17份普通硅酸盐水泥，17份硫铝酸盐水泥，6份天然石膏，细集料天然河砂48份，填料重钙粉12份，减水剂0.40份，缓凝剂0.16份，早强剂0.12份，乳胶粉0.40份，增稠剂0.012份。A sulphoaluminate cement-based self-leveling mortar, the raw material for preparing the mortar includes the following materials by weight in addition to water: 17 parts of ordinary Portland cement, 17 parts of sulphoaluminate cement, and 6 parts of natural gypsum , 48 parts of fine aggregate natural river sand, 12 parts of heavy calcium powder for filler, 0.40 part of water reducer, 0.16 part of retarder, 0.12 part of early strength agent, 0.40 part of latex powder, and 0.012 part of thickener.
采用与实施例1相同的方法制备自流平砂浆但采用水灰比为0.45，采用与实施例1相同的测试方法测试砂浆性能参数，具体结果见附表1中样品4。The self-leveling mortar was prepared by the same method as in Example 1, but the water-cement ratio was 0.45, and the performance parameters of the mortar were tested by the same test method as in Example 1. See sample 4 in Attached Table 1 for specific results.
由表1可知，所得硫铝酸盐水泥基自流平砂浆匀质性良好、无离析泌水现象，且与建材标准JC/T 985-2005相比，1d抗折强度与抗压强度分别为5.54MPa与18.23MPa，明显高于标准中的2.0MPa与6.0MPa要求，界面粘结强度值在14d时已经达到标准要求的1.0MPa，抗冲击等指标均达标。It can be seen from Table 1 that the obtained sulphoaluminate cement-based self-leveling mortar has good homogeneity and no segregation bleeding phenomenon, and compared with the building material standard JC/T 985-2005, the 1d flexural strength and compressive strength are 5.54 MPa and 18.23MPa are significantly higher than the standard requirements of 2.0MPa and 6.0MPa. The interfacial bond strength value has reached the standard requirement of 1.0MPa at 14 days, and the impact resistance and other indicators are all up to standard.
实施例5Example 5
一种硫铝酸盐水泥基自流平砂浆，制备该砂浆的原材料中除水以外包包括以下重量份的材料组成：17份普通硅酸盐水泥，17份硫铝酸盐水泥，6份天然石膏，细集料天然河砂36份，填料重钙粉24份，减水剂0.40份，缓凝剂0.16份，早强剂0.16份，乳胶粉0.40份，增稠剂0.012份。A sulphoaluminate cement-based self-leveling mortar, the raw material for preparing the mortar includes the following materials by weight in addition to water: 17 parts of ordinary Portland cement, 17 parts of sulphoaluminate cement, and 6 parts of natural gypsum , 36 parts of fine aggregate natural river sand, 24 parts of heavy calcium powder for filler, 0.40 part of water reducer, 0.16 part of retarder, 0.16 part of early strength agent, 0.40 part of latex powder, and 0.012 part of thickener.
采用与实施例4相同的方法及水灰比制备自流平砂浆，采用与实施例1相同的测试方法测试砂浆性能参数，具体结果见附表1中样品5。The self-leveling mortar was prepared by the same method and water-cement ratio as in Example 4, and the performance parameters of the mortar were tested by the same test method as in Example 1. For specific results, see Sample 5 in Attached Table 1.
由表1可知，所得硫铝酸盐水泥基自流平砂浆匀质性良好、无离析泌水现象，且与建材标准JC/T 985-2005相比，1d抗折强度与抗压强度分别为8.70MPa与21.96MPa，明显高于标准中的2.0MPa与6.0MPa要求，界面粘结强度值在14d时已经达到标准要求的1.0MPa，抗冲击等指标均达标。It can be seen from Table 1 that the obtained sulphoaluminate cement-based self-leveling mortar has good homogeneity and no segregation and bleeding phenomenon, and compared with the building material standard JC/T 985-2005, the 1d flexural strength and compressive strength are 8.70 MPa and 21.96MPa are significantly higher than the standard requirements of 2.0MPa and 6.0MPa. The interfacial bond strength value has reached the standard requirement of 1.0MPa at 14 days, and the impact resistance and other indicators are all up to standard.
实施例6Example 6
一种硫铝酸盐水泥基自流平砂浆，制备该砂浆的原材料中除水以外包包括以下重量份的材料组成：17份普通硅酸盐水泥，17份硫铝酸盐水泥，6份天然石膏，细集料天然河砂36份，填料重钙粉24份，减水剂0.36份，缓凝剂0.16份，早强剂0.12份，乳胶粉0.60份，增稠剂0.020份。A sulphoaluminate cement-based self-leveling mortar, the raw material for preparing the mortar includes the following materials by weight in addition to water: 17 parts of ordinary Portland cement, 17 parts of sulphoaluminate cement, and 6 parts of natural gypsum , 36 parts of fine aggregate natural river sand, 24 parts of heavy calcium powder for filler, 0.36 part of water reducer, 0.16 part of retarder, 0.12 part of early strength agent, 0.60 part of latex powder, and 0.020 part of thickener.
采用与实施例4相同的方法及水灰比制备自流平砂浆，采用与实施例1相同的测试方法测试砂浆性能参数，具体结果见附表1中样品6。The self-leveling mortar was prepared by the same method and water-cement ratio as in Example 4, and the performance parameters of the mortar were tested by the same test method as in Example 1. For specific results, see Sample 6 in Attached Table 1.
由表1可知，所得硫铝酸盐水泥基自流平砂浆匀质性良好、无离析泌水现象，且与建材标准JC/T 985-2005相比，1d抗折强度与抗压强度分别为5.53MPa与16.33MPa，明显高于标准中的2.0MPa与6.0MPa要求，界面粘结强度值在14d时已经达到标准要求的1.0MPa，抗冲击等指标均达标。It can be seen from Table 1 that the obtained sulphoaluminate cement-based self-leveling mortar has good homogeneity, no segregation and bleeding phenomenon, and compared with the building material standard JC/T 985-2005, the 1d flexural strength and compressive strength are 5.53 MPa and 16.33MPa are significantly higher than the standard requirements of 2.0MPa and 6.0MPa. The interface bond strength value has reached the standard requirement of 1.0MPa at 14 days, and the impact resistance and other indicators are all up to standard.
表1硫铝酸盐水泥基自流平砂浆的性能Table 1 Properties of sulphoaluminate cement-based self-leveling mortar
以上所述仅是本发明的优选实施方式，应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出若干改进和变换，这些都属于本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the creative concept of the present invention, some improvements and changes can also be made, and these all belong to the present invention scope of protection.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810622072.8ACN108706937A (en) | 2018-06-15 | 2018-06-15 | A kind of sulphoaluminate cement base gravity flowing levelling mortar and preparation method thereof |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810622072.8ACN108706937A (en) | 2018-06-15 | 2018-06-15 | A kind of sulphoaluminate cement base gravity flowing levelling mortar and preparation method thereof |
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| CN108706937Atrue CN108706937A (en) | 2018-10-26 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201810622072.8APendingCN108706937A (en) | 2018-06-15 | 2018-06-15 | A kind of sulphoaluminate cement base gravity flowing levelling mortar and preparation method thereof |
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| CN (1) | CN108706937A (en) |
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