Mass concrete in winter as well as preparation method and construction method of mass concrete

Abstract

The invention discloses a construction method of mass concrete in winter. After preparing, pumping and pouring of mass concrete in winter, thermal insulation coverage and maintenance are finished by using plastic cloth and a plurality of layers of flame retardant heat preservation quilts and blankets, wherein each cubic meter of mass concrete in winter comprises the following components by weight: 309kg-321kg of ordinary silicate cement, 1002kg-1062kg of cobble, 752kg-798kg of sand, 172kg-180kg of water, 117.5kg-122.5g of an admixture and 16kg-20.4kg of an additive. The preparation method comprises the following steps: firstly, pouring all cobble and sand in the matching ratio and 70% of water into a stirrer, and stirring for 13-17 seconds, so as to wet the cobble and the sand; then pouring all ordinary silicate cement, admixture and additive, making a shell, and stirring for 27-33 seconds; and adding residual 30% of water, pasting and stirring for 55-65 seconds.

Description

technical field [0001] The invention relates to a mix ratio of winter mass concrete, a preparation method and a construction method thereof. Background technique [0002] According to the current national standard "Code for Thermal Engineering Design of Civil Buildings" GB50176, the north of the Yellow River in my country is commonly known as the cold area, and the number of days with the average daily temperature below 5°C in the whole year is about 100 days; and the daily average temperature is equal to or Below 5°C, it belongs to winter construction. Therefore, winter construction in cold areas is often unavoidable, and scientific and reasonable construction methods must be adopted in winter construction to avoid volume expansion of concrete after freezing, stop hydration, and greatly reduce the strength level and impermeability level, so as to ensure project quality, especially It is the construction of mass concrete in winter. [0003] Since the key technology of concr...

AI Technical Summary

Problems solved by technology

This kind of greenhouse method adopts the mix ratio and preparation method of mass concrete at normal temperature, but the cost of greenhouse method is relatively high, which is about 66.62 yuan per cubic meter of concrete, accounting for the construction cost of mass concrete in winter A large part of it, and it takes a lot of labor to build and dismantle the greenhouse, which needs to be improved urgently

Images