Super-retarding concrete and preparation method thereof

A concrete and super retarded technology, applied in the field of super retarded concrete and its preparation, can solve the problems of high price and high cost, and achieve the effects of low cost, enhanced fluidity and accelerated solidification

Active Publication Date: 2021-02-26
湖北云海混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned ultra-retarded concrete has good retarding performance, because the retarder of the above-mentioned super-retarded concrete mainly uses sodium gluconate and sodium citrate which are relatively expensive, the cost is relatively high

Method used

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  • Super-retarding concrete and preparation method thereof
  • Super-retarding concrete and preparation method thereof
  • Super-retarding concrete and preparation method thereof

Examples

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preparation example 1

[0042] This preparation example provides a setting retarder for concrete, which can control the concrete not to perform initial setting within 48 hours, thereby prolonging the setting time of the concrete to facilitate transportation; specifically, the setting retarder is composed of sodium citrate, sodium gluconate, Phosphogypsum, fly ash and carbide slag are compounded according to a certain weight ratio. The specific weight fraction of each component of the retarder is shown in Table 1 (1 weight fraction = 1 kg).

[0043] In the present embodiment, the preparation method of retarder is as follows:

[0044] First mix sodium citrate and sodium gluconate at room temperature (such as 20 to 40°C, preferably 30°C), then let the mixture of sodium citrate and sodium gluconate stand for at least 3 minutes, and then add phosphogypsum in turn , then the mixture of sodium citrate, sodium gluconate and phosphogypsum is stirred and fully stirred, and then fly ash and calcium carbide slag...

preparation example 2～6

[0046] Compared with Preparation Example 1, the composition of sodium citrate, sodium gluconate, phosphogypsum, fly ash and calcium carbide slag in the retarder is different, and the detailed weight ratio values ​​of each component of the retarder are shown in Table 1 (1 weight ratio). number of servings = 1kg).

[0047]

Embodiment 1

[0049] This embodiment discloses an ultra-retarding concrete, including gel material, artificial sand, crushed stone, water reducer, retarder, and water, wherein the gel material is mixed with cement, mineral powder and coal ash. In the gel material, the weight of each of the mineral powder and coal ash in the gel material accounts for not less than 10% by weight of the gel material, and the sum of the total weight of the mineral powder and coal ash in the gel material accounts for the weight percentage of the gel material. is 20-50%, the retarder is selected from the retarder recorded in Preparation Example 1, and the specific parts by weight of each component of the concrete (1 part by weight=1kg) are detailed in Table 2;

[0050] At this time, the method for preparing the concrete of the present embodiment comprises the following steps:

[0051] S1: put cement, mineral powder, coal ash, artificial sand, water reducing agent, retarder and water into a concrete mixer for mixi...

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Abstract

The invention relates to super-retarding concrete and a preparation method thereof, and relates to the technical field of concrete preparation. The concrete is prepared from the following components in parts by weight: 340 to 360 parts of a gel material, 700 to 900 parts of artificial sand, 900 to 1200 parts of broken stone, 7 to 8 parts of a water reducing agent, 8 to 10 parts of a retarder and 150 to 190 parts of water, wherein the gel material is formed by mixing cement, mineral powder and coal ash, the respective weight of the mineral powder and the coal ash in the gel material accounts for not less than 10% of the weight of the gel material, and the sum of the total weight of the mineral powder and the coal ash in the gel material accounts for 20-50% of the weight of the gel material.The retarder is prepared from sodium citrate, sodium gluconate, phosphogypsum, fly ash and carbide slag according to the weight ratio of (20-24): (16-18): (35-42): (16-20): 3. According to the invention, the concrete can be controlled not to be initially set within 48 hours, and the transportation is convenient.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to an ultra-retarding concrete and a preparation method thereof. Background technique [0002] With the development of society and the needs of various large-scale projects, the application scope of concrete is constantly expanding, and the performance requirements of concrete are also getting higher and higher. In many large-scale projects, in order to meet the needs of construction procedures and construction time, it is required to extend the setting time, but also to ensure the strength of the late setting. [0003] Now retrieved a Chinese patent with publication number CN107586077B, which discloses an ultra-retarding concrete, which includes the following components in parts by weight: 165-175 parts of water, 160-260 parts of cement, 56-64 parts of mineral powder parts, 80-160 parts of fly ash, 835-841 parts of sand, 983 parts of stone, and 6-8.5 parts of admixtur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B24/10C04B103/22
CPCC04B28/02C04B40/0039C04B2103/22C04B18/12C04B18/08C04B14/06C04B2103/302C04B24/06C04B24/10C04B22/144C04B18/0481
Inventor 李海斌熊还超张朋詹赡陈亮
Owner 湖北云海混凝土有限公司
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