Energy-saving concrete for buildings and preparation process thereof

Abstract

The invention discloses energy-saving concrete for buildings and a preparation process thereof. The energy-saving concrete for buildings comprises the following raw materials in parts by weight: 80-120 parts of a cementing material, 30-50 parts of sand, 8-12 parts of modified aggregate, 10-14 parts of an excitant, 3-5 parts of a water reducing agent, 3-5 parts of a foaming agent and 12-14 parts ofpolyester fiber extraction waste liquid. According to the preparation process of the energy-saving concrete for the building, the continuity and stability of excitation of sodium sulfate to mineral admixtures are maintained by utilizing sodium sulfate, the absorption capacity of a hydration system to Ca (OH) 2 is accelerated by doping sodium sulfate, the depolymerization and dissolution of vitreous bodies in fly ash and mineral powder are accelerated by the existence of alkali, and the fly ash and mineral slag are promoted to participate in hydration reaction; more CSH gel is generated, so that the strength of the concrete block is improved, and finally, the aggregate is subjected to modification treatment, and triethanolamine is used for modifying the surface of polystyrene, so that themechanical property of concrete is effectively improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an energy-saving concrete for building and a preparation process thereof. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, the term concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate; mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. Concrete, which is widely used in civil engineering. [0003] With reference to Chinese Patent Publication No. CN103936341B, a kind of energy-saving concrete for construction is proposed. The components of the raw materials are by weight, 100 parts of cement, 60-70 parts of water, 30-35 parts of straw powder, 20-25 parts of corn bone meal, 15-19 parts of fine sand, 12-17 parts of tradi...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a kind of energy-saving concrete for construction and its preparation process, which maintains the liquid phase alkalinity of the cementitious material within a stable range through sodium sulfate, and keeps sodium sulfate from stimulating mineral admixtures. The continuity and stability of Ca(OH) 2 The crystallization nucleation and crystal development, increase the early hydration rate of silicate minerals, Ca(OH) produced in cement hydration 2 Under the synergistic effect of other hydration products, higher compressive and flexural strengths are obtained. At the same time, the incorporation of sodium sulfate accelerates the hydration system’s effect on Ca(OH) 2 The presence of alkali accelerates the depolymerization and dissolution of the vitreous body in fly ash and slag, promotes the participation of fly ash and slag in the hydration reaction, and generates more C-S-H gel, which makes the strength of the concrete block improved. Improve, and finally modify the aggregate, wherein the modified aggregate is made of polystyrene, waste rubber, styrene-based block copolymer, dicumyl peroxide, trimethylolpropane triacrylate, titanium Ester coupling agent and modifier, use triethanolamine to modify the surface of polystyrene, effectively improve the mechanical properties of concrete, and solve the problem that the straw powder and corn bone powder used in the patent publication number CN103936341B cannot be effectively combined with The accelerated reaction between cements leads to the problem that the strength of the prepared building concrete is difficult to meet the technical requirements