Ceramsite floating restraining and resistance reducing agent and method for reducing floating degree of ceramsite in pumped ceramsite concrete

Abstract

The invention provides a ceramsite floating restraining and resistance reducing agent and a method for reducing the floating degree of ceramsite in pumped ceramsite concrete. A method for detecting the ceramsite floating index for representing the floating degree of the ceramsite is provided, a reverse vibrating treatment measure and a reverse secondary hitting method are adopted, operation is easy and fast, and the result reliability is high. According to the ceramsite floating restraining and resistance reducing agent and the method applying the ceramsite floating restraining and resistance reducing agent to reducing the floating degree of the ceramsite in the pumped ceramsite concrete, pumping resistance can be effectively lowered, the pumping and lubricating effect can be improved, the pumping speed can be increased, pumping pressure can be lowered, and the percent of the slump of the ceramsite concrete doped with the ceramsite floating restraining and resistance reducing agent to the slump of ceramsite concrete without being doped with the ceramsite floating restraining and resistance reducing agent is not lower than 90%.

Description

technical field [0001] The invention belongs to the fields of ceramsite concrete preparation control technology and ceramsite concrete working performance detection method, and relates to a ceramsite buoyancy-reducing agent and a method for reducing the ceramsite floating degree in pumped ceramsite concrete. Background technique [0002] With the continuous improvement of the country's energy-saving and environmental protection requirements for buildings, more and more building floors are designed with lightweight concrete to reduce their own weight and achieve the effect of thermal insulation and sound insulation. As a kind of lightweight concrete with good thermal insulation, heat insulation and sound insulation properties, ceramsite concrete has gradually been widely used in construction projects, but due to the low density of ceramsite as a coarse aggregate (the apparent density is generally not more than 1500kg / m 3 ), there is a large density difference between cerams...

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Problems solved by technology

[0006] At present, there is no research on the side effects of viscosifying admixtures, and there is no research on the adaptability of viscosifying and pumping construction and a feasible solution; With the increase of pump pressure, higher requirements are put forward for the fluidity, cohesion, stability and homogeneity of ceramsite concrete. Discussion and research on the contradictory unity of viscosity increase and drag reduction lubricity, did not propose specific technical requirements and quantitative treatment measures to characterize the degree of floating and segregation of ceramsite (such as the quantitative relationship formula between viscosity increaser and fluidity and anti-segregation ), it is impossible to give qualitative and quantitative measurement results and quantitative treatment measures for the pumpability of ceramsite concrete, which leads to large errors in the pre-pump inspection and acceptance, poor guidance, and increases the probability of ceramsite concrete pump blocking

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