Concrete thixotropic agent and preparation method thereof

Abstract

The invention discloses a concrete thixotropic agent and a preparation method thereof, which includes three steps: 1) esterification: under effect of an acidic compound catalyst, preparing an esterification intermediate from a long-chain fatty acid and an alcohol amine compound; 2) quaternization: preparing a quaternary ammonium salt polymer from the esterification intermediate under effect of anethylation agent; 3) blending: adding ultrafine powder and fibers to the quaternary ammonium salt polymer and performing high-speed dispersion to obtain a stable and uniform concrete thixotropic agentsolution. The concrete thixotropic agent has good thixotropic effect, and can improve constructability and usability of concrete when being applied to a bottom plate of ballastless tracks, furthermore achieving excellent rheological property and convenience in construction when the concrete is subjected to dynamic treatments such as pumping, pouring and vibration. During static standing after slope wiping and finishing treatments are completed, the concrete has excellent shape maintaining capability and has convenience in slope shaping; namely, after the slope wiping and finishing treatmentsof the concrete, water discharge performance and ultra-high slope can be effectively maintained.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures in building materials, in particular to a concrete thixotropic agent, and in particular to a preparation method of the thixotropic agent. Background technique [0002] Self-compacting concrete is referred to as SCC, which means that the mixture has high fluidity, gap permeability and segregation resistance. When pouring, it can be uniformly compacted only by its own weight without vibration, and it has the same characteristics as traditional vibration after hardening. Concrete is concrete with comparable mechanical properties, durability and volume stability. Self-compacting concrete is a kind of concrete with high workability, and the slump expansion of concrete is usually >550mm. Due to the outstanding self-filling performance of self-compacting concrete, it is suitable for structures such as densely reinforced, unable to vibrate, thin-walled and complex, and requiring noiseless ...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems existing in the prior art, the present invention discloses a concrete thixotropic agent to prepare high thixotropic concrete, which solves the problem that ordinary concrete cannot be effectively maintained and shaped before hardening, resulting in the design of the superhigh base plate not meeting the requirements and drainage slope It cannot be realized smoothly and it is labor-intensive, time-consuming, labor-intensive and other problems to deal with

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