Zero-chlorine and low-alkali concrete antifreeze and corrosion resistance pumping agent

Abstract

The invention discloses a zero-chlorine and low-alkali concrete antifreeze and corrosion resistance pumping agent, and relates to the technical field of building materials. The pumping agent is prepared from, by weight, 50-60 parts of modified starch, 30-40 parts of modified kaolin, 20-25 parts of straw powder, 15-20 parts of aluminum magnesium silicate, 10-15 parts of glazed hollow beads, 12-18 parts of polyacrylamide, 12-18 parts of carboxymethyl chitosan, 10-15 parts of calcium stearate, 8-12 parts of sodium gluconate, 6-10 parts of epoxidized soybean oil, 5-8 parts of polyethylene wax, 20-25 parts of glycerin and 120-150 parts of water. The pumping agent prepared in the invention has the advantages of zero chlorine, low alkali, strong cement dispersion, high water reducing rate, obvious improvement of the workability of concrete, reduction of the slump, and effective adjustment of the setting time of concrete.

Description

Technical field: [0001] The invention relates to the technical field of building materials, in particular to a chlorine-free and low-alkali concrete antifreeze and anticorrosion pumping agent. Background technique: [0002] Pumping agent, also known as concrete pumping agent. It is an admixture that improves the pumpability of concrete mixtures. The so-called pumpability means that the concrete mixture can pass through the pipeline smoothly without clogging, segregation, and good viscoplasticity. The pumping agent is composed of water reducing agent, retarder, air entraining agent, lubricant and so on. At present, in order to meet the concrete performance and construction requirements, it is often necessary to add one or more functional admixtures and pumping agents to the concrete to form a mixture. This not only increases the difficulty of construction and production cost, but also makes it very easy for the same or similar functional components in several admixtures to...

AI Technical Summary

Problems solved by technology

This not only increases the difficulty of construction and the cost of production, but also easily leads to repeated mixing of the same or similar functional components in several admixtures, resulting in excessive mixing.

Especially when encountering several admixtures with poor compatibility or even incompatibility, the effectiveness of the admixture will be reduced, resulting in bleeding, segregation, and hardening of the concrete, so that it cannot be pumped