Low-temperature early strength non-steam-cured concrete prefabricated member and production method thereof

Abstract

The invention discloses a low-temperature early strength non-steam-cured concrete prefabricated member and a production method thereof. The low-temperature early strength non-steam-cured concrete prefabricated member comprises, by weight, 400-550 parts of Portland cement, 30-70 parts of wollastonite powder, 50-150 parts of slag powder, 800-1100 parts of crushed stone, 600-750 parts of medium sand,160-180 parts of water, 3.6-6.0 parts of an early strength water reducer, and 20-50 parts of a composite early strength agent; the composite early strength agent, the early strength water reducer, the Portland cement, the wollastonite powder and the slag powder are mixed at the low temperature of -5 DEG C to 10 DEG C to prepare the concrete prefabricated member free of steam curing at the low temperature; the production method is simple, the prefabricated member is suitable for the production of double-sided superposed concrete shear walls, prefabricated wall boards, prefabricated floor slags, prefabricated beams and other building materials, energy is saved, pollution is reduced, the production cycle is shortened, production efficiency is improved, and the prefabricated member and the production method thereof meet the need of building industry for sustainable development.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a low-temperature, early-strength, non-steam-curing concrete prefabricated component and a production method thereof. Background technique [0002] Fabricated prefabricated components are the core and foundation of building industrialization. In the production process of existing concrete prefabricated components, steam curing at room temperature is generally used to accelerate the hydration reaction of concrete, so that the prefabricated components can quickly reach the lifting strength. This method is used to speed up the mold Turnover, improve component production efficiency. In a low temperature environment, the use of steam curing methods consumes a lot of energy, and has an impact on the later performance of the precast component concrete, causing problems such as strength shrinkage and cracks. When the temperature is lower than 5°C, antifreeze early-stren...

AI Technical Summary

Problems solved by technology

However, the use of low-temperature antifreeze and early strength agent will prolong the setting time of concrete precast components and prolong the production cycle, and the strength of components will shrink in the later stage of maintenance, which will affect the durability of concrete precast components.

At present, the application of accelerators in low-temperature environments (especially below 5°C) on the performance and mechanism of concrete is still unclear, and further research is needed