Non-steam autoclaved PHC tubular pile concrete

Abstract

The invention relates to non-steam autoclaved PHC tubular pile concrete, and belongs to the technical field of concrete materials. The non-steam autoclaved PHC tubular pile concrete is composed of a gelling main material, gelling auxiliary materials, a fine aggregate, a coarse aggregate, an admixture, expansion agents, an adhesive, a water reducing agent and a water storage agent, in particular, triethanolamine, lithium sulfate, nitrite, phosphoric acid, copper monoxide powder, aluminum hydroxide are used as the gelling auxiliary materials, tartaric acid, sodium silicate, calcium sulphoaluminate, magnesium oxide, calcium oxide and anhydrite are used as the expansion agents, and hydroxypropyl methylcellulose is used as the water storage agent. PHC tubular piles produced by the concrete havethe good working performance under the normal-temperature non-steam autoclaved condition, the gas content of the concrete is greatly decreased, the contraction amplitude can be lowered, and cracks are avoided; the early strong progress is advanced, the later compressive strength is increased, and the speed is high; the durability and relative dynamic elasticity modulus are also greatly improved,the anti-freezing and anti-cracking properties are high, and any micro-crack is avoided after a large number of subcycles of freeze thawing; and the cost can further be lowered, and the environmentalpollution is reduced.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to pressure-free steamed PHC pipe pile concrete. Background technique [0002] Prestressed high-strength concrete pipe piles (hereinafter referred to as PHC pipe piles) adopt centrifugal forming technology, and the concrete strength grade is not lower than C80. In order to achieve the high strength level of concrete, high-strength cement, high-efficiency water reducer, and well-graded sand and gravel are usually used. Aggregates, including mineral powder, finely ground sand, etc. [0003] Atmospheric pressure steam curing or high pressure steam curing is used in the production process of PHC pipe piles. The purpose of atmospheric pressure steam curing process is to speed up the early hydration process of concrete and improve the turnover of formwork; The thermal synthesis reaction can increase and change the hydration products of the cementitious material, thereby impro...

AI Technical Summary

Problems solved by technology

The concrete is used to prepare PHC pipe columns, which can meet the mold release strength of non-pressure steamed PHC pipe piles and the

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