Amino concrete pumping aid and preparation method thereof

Abstract

The invention discloses an amino concrete pumping aid and a preparation method thereof, wherein the amino concrete pumping aid is composed of following raw materials, by weight, 30-60% of a naphthalene water reducer, 5-15% of an aliphatic-series water reducer, 5-20% of an amino water reducer, 0-6% of a retarder, 0.1-0.7% of an air entraining agent and the balanced being water. The preparation method includes following steps: weighting the raw materials according to the weight percentage ratio, pumping the naphthalene water reducer, the aliphatic-series water reducer and the amino water reducer into a stirring pot, stirring the materials for 25-30 min, adding the retarder with stirring for 5-10 min, adding the air entraining agent and the water with stirring for 1 h, and finally pumping out the pumping aid. The amino concrete pumping aid, which is formed by compounding multiple water reducers with single retardant, is high in strength, is good in pumpability, is good in flowability and is low in cost.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an amino concrete pumping agent and a preparation method thereof. Background technique [0002] In the process of concrete engineering construction, the transportation and pouring of concrete is a heavy and critical work. It requires speed, timeliness, quality assurance and reduced labor consumption. This is all the more important in modern concrete projects that are characterized by large scale, high height and increased complexity. As a result, concrete pumping construction technology came into being and has become one of the symbols of modern concrete. [0003] The viscoplasticity of concrete pumping agents currently on the market is not good enough, and segregation is prone to occur over time. Moreover, concrete is prone to bonding, and its strength is not high enough. At the same time, the concrete pumping agents on the market are generally formulated with single-compon...

AI Technical Summary

Problems solved by technology

[0003] The viscoplasticity of concrete pumping agents currently on the market is not good enough, and segregation is prone to occur over time

Moreover, the concrete is prone to bonding, and the strength is not high enough

At the same time, the concrete pumping agents on the market are generally formulated with single-component water reducers and retarders, so they have the following disadvantages: poor cement adaptability, usually only suitable for a few cement varieties, poor fluidity, low temperature conditions in winter Precipitation of crystals (composition of Na2SO4 or CaSO4) and precipitation, resulting in blockage of the pipeline and failure of normal use. At the same time, the quality is extremely unstable and the slump loss is rapid

In order to ensure the pumpability of the pumped concrete, some air-entraining agents are often added to the pumped concrete. Due to the large difference in the performance of various air-entraining agents, the states presented in the concrete are also different. The air-entraining agent will form large bubbles in the concrete, and the surface energy is low, so it is easy to form large interconnected bubbles. If the vibration is unreasonable, the large bubbles cannot be completely discharged, and it will definitely cause honeycomb on the surface of the hardened concrete structure. Pockmarked surface affects project quality