Pumping agent for mass concrete

Abstract

The invention discloses a pumping agent for mass concrete. The pumping agent for mass concrete is prepared from the following raw materials in parts by weight: 120-150 parts of a polycarboxylate-typewater reducer, 60-75 parts of a polycarboxylate-type collapse retaining agent, 30-40 parts of sodium gluconate, 10-20 parts of maltodextrin, 10-15 parts of protein polysaccharide, 1-5 parts of lacticacid, 0.5-1 part of p-hydroxyanisole, 2.0-3.0 parts of sodium lignin sulfonate, 10-15 parts of sodium carboxymethylcellulose and 740-760 parts of water which are fully stirred and matched in a stirring device. The pumping agent disclosed by the invention can be suitable for pumping mass concrete in various temperature conditions, in particular high temperatures in summer, and also has the advantages of being high in water reducing rate, good in collapse retaining property, low in gas content and the like, and can improve the peaceability of the concrete; according to the structural design of the stirring device, various raw materials which are matched are fully mixed, so that the matching efficiency is increased, and excellent performance of the pumping agent is ensured.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a pumping agent for large-volume concrete. Background technique [0002] Concrete pumping agent is an admixture to improve concrete pumping performance. It is used in concrete mixing and construction to reduce concrete pumping friction, concrete segregation and slump loss, and can improve the workability of concrete and increase Pumpability of fresh concrete. During the pumping process of concrete, especially in harsh weather conditions such as high temperature in summer, pump blockage often occurs, which makes construction difficult. Therefore, the research on concrete pumping agents is still an important direction in the technical field of concrete admixtures ; At the same time, in mass concrete, due to the high temperature difference between the inside and outside of the concrete caused by the heat release of cement spray, the mass concrete often cracks severely. ...

AI Technical Summary

Problems solved by technology

During the pumping process of concrete, especially in harsh weather conditions such as high temperature in summer, pump blockage often occurs, which makes construction difficult. Therefore, the research on concrete pumping agents is still an important direction in the technical field of concrete admixtures ; At the same time, in mass concrete, due to the high temperature difference between the inside and outside of the concrete caused by the heat release of cement water, the mass concrete often cracks severely

Images