Modifying agent for building expansion material

Abstract

The invention relates to an additive used in the construction industry, in particular to an additive for a lightweight member in a cast-in-place hollow building roof, which comprises the following components by weight percentage in modifying agent: 5.4 to 34.6 percent of early strength agent, 3.3 to 39.6 percent of diffusion agent, 5.4 to 28.8 percent of water-reducing agent, 2.7 to 21.6 percent of suspending agent, 3.8 to 27.4 percent of foaming agent, and 1.1 to 25.9 percent of foam stabilizer. The modifying agent adopting the proposal improves strength of a member greatly, and the member is quickly molded; the cement foaming agent in the additive has strong dispersion property and does not generate phenomenon such as caking and flocculation, shrinkage, bleeding and deposition during production of foam concrete; the foam concrete has stable air holes, and can be reacted with cement to generate cement solid foam concrete which has low water absorption rate; and the air holes are separately closed, and do not absorb water or store water. The added early strength agent can accelerate settling time of the cement concrete, can meet the characteristics of the concrete such as large fluidity, delayed coagulation, early strength and no backward shrinkage on later strength, has good durability, improves construction efficiency, and can improve the strength of the concrete by more than 40 percent in two days. By using the materials for the modifying agent added according to a proportion, the additive has the advantages of light weight, heat preservation, thermal insulation, large strength, quick formation and the like, is tighter and firmer to joint with other building materials, and can be completely used in the building roof.

Description

technical field [0001] The invention relates to an additive used in the construction industry, in particular to an additive for lightweight components in cast-in-place hollow slabs. Background technique [0002] At present, my country's construction industry is in the heyday of development. Since 1990, the construction area of ​​my country's annual construction and completion has increased year by year. To make my country's economy develop sustainably, steadily and healthily, and save resources, in terms of construction with concrete as the main material, Especially in terms of energy-saving wall products and roof enclosure materials, the most important technical direction is to achieve lightweight insulation. Conventional floor components are poured with concrete mortar, but the amount of concrete mortar is large and heavy, which increases the weight of the entire floor and is not conducive to pouring. At present, there are few materials for cast-in-place hollow floor compon...

AI Technical Summary

Problems solved by technology

Conventional floor components are poured with concrete mortar, but the amount of concrete mortar is large and heavy, which increases the weight of the entire floor and is not conducive to pouring. At present, there are few materials for cast-in-place hollow floor components. The development of new high-performance grouting materials has become a top priority

[0003] The applicant introduced the shape and material of a hollow floor member in its application number 200810115294.7, which reduces some problems of the self-weight of the floor itself. It uses concrete mortar to cast a hollow member, and then pours the hollow member on In the floor, because it is a hollow structure, the weight of the floor itself is greatly reduced. However, because the components themselves are made of concrete mortar and ordinary cement, the weight of the components themselves is still too large. In today's urban land shortage, space utilization is developing to high altitudes. , the building is getting taller and taller, so higher requirements are placed on the weight of the building materials themselves.

[0004] In the patent No. 200710055329.8, a kind of cellular concrete is introduced, wherein the auxiliary materials added include waterproofing agent, bleeding agent, suspending agent, foam stabilizer, reinforcing agent, etc., and various auxiliary materials are added in a certain proportion. The product is mainly used as a roofing material for houses, and cannot be used as a load-bearing surface, and the product takes a long time to shape, and there is still a lack of improvement in the type and amount of additives