Early strength micro expansion steel fiber road concrete

Abstract

The early strength microswelling steel fiber reinforced road concrete is used in building engineering. It consists of Portland cement 10-15 wt%, coarse aggregate 45-50 wt%, fine aggregate 25-30 wt%, water 4.1-6.55 wt%, expansion agent 1.5-1.8 wt%, steel fiber 3.0-3.5 wt%, early strength water reducing agent 0.35-0.45 wt%. By means of the steel fiber with high breaking strength, high impact strength and excellent wear resistance, the cement concrete road poured with the road concrete has shortened cure period, low maintenance cost, long service life, effectively reduced extension joint, less noise and environment friendship.

Description

technical field [0001] The invention relates to a concrete, in particular to an early-strength micro-expansion steel fiber road concrete. Used in the field of construction engineering technology. Background technique [0002] At present, my country's highway construction is in a stage of rapid development, and most of its road surfaces are asphalt pavement, while cement concrete pavement accounts for a small part. However, my country's asphalt resources are limited, and a large part of it depends on imports. Relatively speaking, my country's cement production is large and widely distributed, and it can be supplied locally in various places, and the cement concrete pavement has high rigidity, strong bearing capacity, good stability and long service life. , less daily maintenance costs and other advantages. Therefore, in order to meet the needs of the rapid and stable development of the national economy and further accelerate the pace of my country's highway construction, esp...

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Problems solved by technology

[0004] After searching the literature of the prior art, it was found that the Chinese patent application number CN200410016581.4, the patent name is "Road Concrete Admixture for Improving Flexural Strength", this patent achieves concrete flexural resistance by adding an admixture to ordinary concrete The strength is improved, but it does not solve the cracking of concrete and the defects of setting a large number of expansion joints

At the same time, after the cement concrete pavement is poured, it usually requires a long period of maintenance. Generally, the concrete needs to be maintained for 14-21 days before it can be opened to traffic, which also limits and restricts its wide-ranging application in road engineering.

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