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Concrete and preparation method thereof

A technology for concrete and setting retarder, applied in the field of building materials, can solve the problems of limited mixing capacity of the mixing device, impossible to take care of concrete, curing, etc., and achieve the effect of inhibiting the hydration process of cement, improving the retarding effect, and improving the hydrophobicity.

Active Publication Date: 2019-08-16
广东腾基建设有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual situations, some concrete needs to be transported for a long time in the concrete mixer truck; although there is a mixing device in the concrete mixer truck to continuously mix the concrete, the mixing capacity of the mixing device is limited, and the mixing device does not It is possible to take care of the concrete of each part. Once the transportation time is too long, it is inevitable that the concrete will harden

Method used

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  • Concrete and preparation method thereof
  • Concrete and preparation method thereof
  • Concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0046] Embodiment 1-6: a kind of concrete, including components and corresponding quality as shown in Table 1.

[0047] Each component and its corresponding quality (kg) in table 1 embodiment 1-6

[0048]

[0049] In the above embodiments, the sand is medium sand with a fineness modulus of 2.3-3.0, and the particle size of the mixture of gravel and construction slag is 5-40 mm.

Embodiment 1

[0050] In Example 1, the acid is hydrochloric acid, and the starch used in this example has amylopectin accounting for 70% of the total weight of the starch, and a degree of crosslinking of 15%.

Embodiment 2

[0051] In Example 2, the acids are hydroxycarboxylic acids; in the starch used in this example, the amylopectin accounts for 70% of the total weight of the starch, and the degree of crosslinking is 5%.

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Abstract

The invention discloses a concrete and a preparation method thereof, belongs to the technical field of building materials, and solves the problem that the hardening of the concrete cannot be avoided after the long-term transportation of the concrete. The concrete comprises 100-150 parts of an adhesive material; 250-800 parts of an aggregate; 30-105 parts of water; and 0.1-0.9 part of a retarder; wherein the adhesive material is cement, and the retarder is composed of starch and an acid composition at a weight percentage ratio of 1:(0.1-0.8); the acid composition consists of an organic acid andan inorganic acid at a weight percentage ratio of (0.7-2):1, the organic acid is one or more of hydroxycarboxylic acids and aminocarboxylic acids, and the inorganic acid is one of hydrochloric acid,sulfuric acid, and phosphoric acid; and the crosslinking degree of the starch is 5%-15%, and the amylopectin in the starch accounts for 70%-90% of the total weight of the starch. The method achieves the effects of retarding and retarding time adjustment by the retardation of the starch and the hydrolysis of the acid composition.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to concrete and a preparation method thereof. Background technique [0002] Concrete, referred to as concrete for short, refers to the collective name of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. The term concrete usually refers to the cement concrete obtained by mixing cement as the cementitious material, sand and gravel as the aggregate, and water (may contain admixtures and admixtures) in a certain proportion. The hydration reaction between water and cement occurs, and the clinker minerals in the cement and water form gel and metal hydroxide, and the gel wraps the aggregate; in the process of water evaporation and hydration reaction, the concrete is gradually completed hardening. [0003] After the concrete components are mixed, the hydration reaction of cement and water and the evaporation of water will ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/06
CPCC04B28/04C04B28/06C04B2201/50C04B14/06C04B14/02C04B18/16C04B2103/22C04B24/16C04B22/124
Inventor 邓丽娟余建明
Owner 广东腾基建设有限公司
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