Super-retarding durable concrete and preparation process thereof

Abstract

The invention relates to the field of concrete preparation, and particularly discloses super-retarding durable concrete and a preparation process thereof. The invention relates to super-retarding durable concrete, which is prepared from the following raw materials in parts by weight: 280 to 320 parts of cement, 30 to 40 parts of fly ash, 50 to 60 parts of mineral powder, 550 to 680 parts of sand, 700 to 800 parts of gravel, 142 to 156 parts of water, 7.5 to 8.2 parts of additive, 10 to 25 parts of composite fiber and 15 to 35 parts of hydroxycarboxylic acid modified filler, the preparation process comprises the following steps: S1, weighing the cement, the fly ash and the mineral powder, and uniformly mixing and stirring to prepare a primary mixture; s2, sand and gravel are weighed and added into the primary mixture to be mixed and stirred to be uniform, then composite fibers and hydroxycarboxylic acid modified filler are added to be mixed and stirred to be uniform, and a mixture is prepared; s3, weighing water and an additive, adding the water and the additive into the mixture, and uniformly stirring to obtain a finished product. The concrete with good retarding effect and high mechanical strength is prepared.

Description

technical field [0001] The present application relates to the field of concrete preparation, and more particularly, to an ultra-retarding durable concrete and a preparation process thereof. Background technique [0002] With the development of society, various large-scale projects need to use concrete. The external ambient temperature and the volume of concrete can easily affect the setting time of concrete, and the setting time of concrete directly affects its performance after hardening. [0003] At present, the method of adding retarder in concrete is often used to prolong the setting time of concrete, but the addition of retarder can easily affect the early strength and 28d compressive strength of concrete, thus easily affecting the product quality of finished concrete. [0004] Therefore, how to prepare a concrete with good retardation effect and high mechanical strength is a problem to be solved. SUMMARY OF THE INVENTION [0005] In order to prepare a concrete with ...

AI Technical Summary

Problems solved by technology

[0003] At present, the method of adding retarder is often used in concrete to prolong the setting time of concrete, but the addition of retarder is likely to affect the early strength of concrete and the 28d compressive strength Strength, thus easily affecting the product quality of finished concrete

Images