Preparation method of adding agent for controlling concrete collapse loss

Abstract

The invention relates to a method of making additive for controlling concrete collapsing loss, belonging to building material technical field. The composition of said additive is: zeolitic powder, water reducing agent, calcium lignosulfonate and water. Its making method is: mix water reducing agent and calcium lignosulfonate in definite proportions, stir the mixture thoroughly; add natural zeolitic powder to the mixture in proportions and stir it; spray said mixture and add water to it in proportions, stir it at the same time, dry at the room temperature, and crush to get said additive.The additive making method in said invention is characterized by: there is only physical adsorption and desorption process without chemical reaction, therefore, it is friendly to environment without releasing of waste liquid, waste gas, waste slag, etc; it only needs strong mixing at normal temperature during the production process with simple production facilities, and the technique is easy to control. The additive is capable of diminishing and controlling collapsing loss, which could not only control collapsing loss of common concrete, but also control collapsing loss of high-intensity high fluidized form concrete.

Description

technical field [0001] The invention relates to a preparation method of an admixture for controlling concrete slump loss, and belongs to the technical field of building materials. Background technique [0002] According to reports, my country's concrete output has reached 2 billion m 3 / year. The annual output of ready-mixed concrete also reaches about 500-600 million m 3 / year. The technical problem encountered in the construction and application of ready-mixed concrete is the rapid loss of slump, especially in the process of transportation and construction of high-strength high-performance concrete, the loss of slump is faster, and it is difficult to pump for construction. In summer, when the commercial concrete is transported from the mixing station to the construction site, the concrete cannot be unloaded due to the rapid loss of slump, so the concrete can only be poured out by adding water and re-stirring on site. But this kind of concrete cannot guarantee the quali...

AI Technical Summary

Problems solved by technology

Now some concrete water reducer manufacturers, in order to control the loss of concrete slump, often add citric acid, sodium tripolyphosphate and white sugar, etc., with an amount of 10%-14%, which increases the cost of concrete and also affects the quality of concrete. The performance of some concrete cannot be hardened for a long time after pouring, which is caused by the addition of too much retarder