High-performance pumpable concrete for well drilling wall and preparation method thereof

Abstract

The invention discloses high-performance pumpable concrete for a well drilling wall and a preparation method thereof. The high-performance pumpable concrete comprises the following components in parts by weight: 400-450 parts of cement, 0-30 parts of silicon powder, 40-100 parts of coal ash, 0-100 parts of slag, 460-600 parts of a bonding material, 620-730 parts of sand, 1060-1110 parts of stone, 160-170 parts of water and a water reducer and a pumping agent which accounts for 1-3% of the total weight of the components. The concrete disclosed by the invention can satisfy the mobility of pumping request and the slump of the concrete is over 160mm; the concrete is good in homogeneity and the high-performance concrete prepared is not layered or separated and does not bleed under a great slump, so that the pump concrete discharged is in a continuous and uninterrupted turbulent condition; the frictional resistance of the concrete with a pipe wall is small and the preparation process is simple; the concrete is low in heat of hydration, high in durability and ant-crack and anti-permeability performances.

Description

technical field [0001] The invention relates to a concrete material, in particular to a high-performance pumping concrete for drilling well walls and a preparation method thereof. Background technique [0002] The topsoil and weathered bedrock sections of the main shaft, auxiliary shaft and air shaft of the coal mine are constructed by freezing method. The thickness of the three shafts passing through the topsoil layer is at least 450m, and the designed net diameter of the shaft is at least 6m. [0003] Due to the deep topsoil layer that the three frozen shafts pass through, the large diameter of the shaft, and the complex stress on the shaft wall, it is necessary to adopt a high-strength shaft wall structure. Ordinary concrete structures cannot resist strong external loads. Considering the special construction environment of frozen shafts, whether it is low-strength concrete or high-strength concrete, higher requirements are placed on the performance of concrete. , It is r...

AI Technical Summary

Problems solved by technology

Ordinary concrete structures cannot withstand strong external loads. Considering the special construction environment of frozen shafts, whether it is low-strength concrete or high-strength concrete, higher requirements are placed on the performance of concrete