Polymer bonding mortarTechnical field
The present invention relates to a kind of building dry-powder function mortar, particularly relate to a kind of heat insulating system substrate pretreated that is used for, improve the adhesive mortar of matrix surface and heat insulating layer cohesive strength.
Background technology
Along with people to improving constantly that the quality of building and attractive in appearance and comfort level require, material of construction is also had higher requirement.Constantly the production application of novel energy-conserving materials for wall of releasing such as gas concrete, light ceramic hollow brick, hollow fly ash building block etc. has not only improved the building operation quality, has improved body of wall thermal insulation and permeability, has also solved many environmental issues.But at present the scene of generally using is stirred mortar and is not only existed qualitative problems of construction such as leak, crack, cohesive strength are low, easily peel off, and acts on singlely, only can play the effect of walling glue stick.
Building dry-powder function mortar is as a kind of novel green material of construction, is widely used in countries such as China and the U.S., Europe.The difference of dry powder function mortar and traditional mortar is, dry powder function mortar is wiped one's face except building by laying bricks or stones of traditional mortar the function, also has heat insulating, water-proofing anticracking, inhale ripple, sound absorption and specific function such as corrosion-resistant, and in use saved hand mixing, not only there is not waste of material, and the mixing evenness height, steady quality.
On the basis of traditional mortar, by allocating different function admixtures into, can give mortar with special function, make the building dry-powder function mortar of various uses, more traditional mortar has remarkable advantages.
Thermal insulation mortar is the building dry-powder function mortar that is most widely used at present, mainly mixes by a certain percentage by components such as cement, sand, mineral additive and chemical functional admixtures, and be a kind of particulate state or pulverulent mixture.Thermal insulation mortar has advantages such as easy construction, intensity height, cost are low, environmental protection, but dry shrinkage and cracking easily, the workability of mortar, cohesive force and general with the matched performance of basic unit.
Summary of the invention
The objective of the invention is to overcome the defective of present common building dry powder function mortar, provide a kind of cohesive strength height, dry-shrinkage deformed little, polymer bonding mortar with good workability.
Polymer bonding mortar of the present invention is made up of according to certain mixed cement, sand, flyash and admixture, and its raw material weight per-cent consists of:
Cement 30～40%
Flyash 5～10%
Sand 50～60%
Solubility rubber powder 1～2%
HPMC 0.2～0.5%
Gypsum 1～3%.
Wherein, described cement is the 425# silicate cement, and described sand can be one or more the combination in yellow ground, river sand or the quartz sand.
The concrete preparation method of polymer bonding mortar of the present invention is:
Above-mentioned various raw materials after the super-dry pre-treatment, are added in the stirrer according to weight proportion weighing cement, flyash, sand and solubility rubber powder, HPMC, gypsum, stirred 5～10 minutes, pack product.
The using method of the polymer bonding mortar that the present invention prepares is: according to adhesive mortar: the weight ratio of water=1: 0.2～0.25, add entry earlier, add adhesive mortar again, fully stirred 3～5 minutes, evenly can use to material, use with reference to consumption 5～6Kg/m2, because of the basic unit situation different slightly variant.The mortar that mixes should use up within 2 hours.
The present invention adopts ordinary Portland cement as inorganic coagulation material, the solubility rubber powder is organic consolidating material, according to certain mixed, and adopt sand and flyash for gather materials, filler, adding an amount of chemical materials is additive, formed the splendid adhesive material of performance, product 28d tensile bond strength (with expansion polyphenyl plate) 0.139MPa, 28d tensile bond strength (with the reference cement mortar) 0.87MPa, operable time 2h, all index reaches DBJ04-234-2005 " External Thermal Insulation System product (material) " standard-required.
Polymer bonding mortar working method of the present invention is simple, and the product cohesive strength height of producing is dry-shrinkage deformed little, has good workability.Adopt polymer bonding mortar of the present invention to construct, the mixing evenness height, steady quality has guaranteed the quality of building operation.
Embodiment
Embodiment 1
Take by weighing the pretreated 425# cement of drying 350Kg, flyash 80Kg, the Yellow River sand 530Kg, 5044 solubility rubber powder 20Kg, HPMC 5Kg, gypsum 15Kg, add in the stirrer together, stirred 8 minutes, discharging, detect qualified back packing product.
Embodiment 2
Take by weighing the pretreated 425# cement of drying 375Kg, flyash 55Kg, the Yellow River sand 525Kg, 5044 solubility rubber powder 16Kg, HPMC 3Kg, gypsum 26Kg, add in the stirrer together, stirred 10 minutes, discharging, detect qualified back packing product.