Preparation method of phosphogypsum-based anti-cracking mortar applied to interior insulation of external wall
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An anti-cracking mortar and gypsum-based technology, applied in the field of comprehensive utilization of waste resources and building materials, can solve the problems of affecting the durability of the thermal insulation system, easy shrinkage, hollow cracking, etc., and achieve environmental protection, fast condensation and hardening, The effect of improving workability
Inactive Publication Date: 2017-06-30
四川华邦保和涂料有限公司
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A large amount of cement is used in the traditional anti-cracking mortar, and the high cement content is easy to shrink and cause the hollow drum to crack, which not only affects the durability of the insulation system, but also has huge energy consumption
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Embodiment 1
[0025] Phosphogypsum-based anti-cracking mortar, its components and mass fraction ratio are: phosphogypsum 60%, drying sand 38%, high-performance plasticizer 0.1%, thixotropic agent 0.2%, water retaining agent 0.2%, gypsum retarder Agent 0.3%, polymer 1%, anti-crack fiber 0.1%, water-material ratio 0.28.
[0026] Preparation method: take each component according to the stated ratio, and stir evenly to obtain the product—phosphogypsum-based anti-cracking mortar.
Embodiment 2
[0028] Phosphogypsum-based anti-cracking mortar, its components and mass fraction ratio are: phosphogypsum 70%, drying sand 28.68%, high-performance plasticizer 0.16%, thixotropic agent 0.2%, water retention agent 0.2%, gypsum retarder Agent 0.36%, polymer 0.3%, anti-crack fiber 0.1%, water-material ratio 0.29.
[0029] Preparation method: take each component according to the stated ratio, and stir evenly to obtain the product—phosphogypsum-based anti-cracking mortar.
Embodiment 3—9
[0031] The composition and percentage of phosphogypsum-based anti-cracking mortar are shown in the table below:
[0032]
[0033] The preparation method of embodiment 3-9 is with embodiment 1 or 2, omission.
[0034] In the above examples: 40%-80% of phosphorus building gypsum, 20%-50% of dry sand, 0%-20% of cement, 0%-5% of fly ash, 0%-0.2% of high-performance plasticizer, Thixotropic agent 0%~0.2%, water retaining agent 0.1%~0.3%, gypsum retarder 0.01%~0.4%, high molecular polymer 0%~3%, anti-crack fiber 0%~0.25%.
[0035] In the above examples: the phosphorus building gypsum is prepared by calcining the industrial waste discharged during the production of phosphate fertilizers after being washed with water β -Type hemihydrate gypsum, its flexural strength ≥ 2.0MPa, compressive strength ≥ 3.0MPa, initial setting time ≥ 3min, phosphorus building gypsum can be replaced by desulfurized building gypsum, natural building gypsum or a mixture of the two.
[0036] In the above ...
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Abstract
The invention discloses a preparation method of phosphogypsum-based anti-cracking mortar applied to interior insulation of an external wall. The preparation method is characterized in that the anti-cracking mortar comprises the following components in percentage by mass: 40-80% of building phosphogypsum, 20-50% of dried sand, 0-20% of cement, 0-5% of fly ash, 0-0.2% of a high-performance plasticizer, 0-0.2% of a thixotropic agent, 0.1-0.3% of a water-retaining agent, 0.01-0.4% of a gypsum retarder, 0-3% of a micromolecular polymer and 0-0.25% of anti-cracking fiber. According to the preparation method, the building phosphogypsum prepared by washing and calcining industrial byproduct phosphogypsum is used as a cementing material, so that the problems that a cement-based material is easy to shrink, hollow and crack are solved; through full use of the characteristics of fast setting and hardening, good volume stability and low own ratio of compressive strength to flexural strength of a gypsum material, the anti-cracking mortar, of which the ratio of the compressive strength to the flexural strength is lower than 2.5, the operable time is 1-2h, the final setting time is shorter than 3h, the insulation board bonding strength is higher than 0.10MPa and breakage occurs inside an insulation board, is prepared. The anti-cracking mortar is applied to the interior insulation of the external wall and low in cost, reduces the environment pollution, and is simple in production process, low in energy consumption and good in product performance; compared with other insulation board crack resisting products, the anti-cracking mortar has higher market competitiveness and is strong in practicality.
Description
technical field [0001] The invention belongs to the field of comprehensive utilization of waste resources and building materials; in particular, it relates to a preparation method of a phosphogypsum-based external wall inner thermal insulation and anti-cracking mortar. Background technique [0002] my country is the most populous country in the world, and agricultural production is very important. With the development of agricultural production, the demand for chemical fertilizers is increasing. Phosphorus fertilizer can increase crop yield, improve crop quality, accelerate the tillering of cereal crops and promote grain fullness; promote the flowering and fruiting of cotton, melons, solanaceous vegetables and fruit trees, and increase the rate of fruiting; increase the sugar content of beet, sugarcane, watermelon, etc.; oil content of the seeds. [0003] The demand for phosphate fertilizers is increasing year by year, reaching 8.5 million tons in 2014. Phosphogypsum is th...
Claims
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