A kind of preparation method of modified coral sand concrete

A coral sand and concrete technology, which is applied in the field of preparation of modified coral sand concrete, can solve problems such as high cost and complicated steps, and achieve the effects of increasing service life, enhancing compressive and flexural properties, and protecting steel bars

Active Publication Date: 2022-05-17
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these modification operations have the problems of relatively complicated steps and high cost

Method used

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  • A kind of preparation method of modified coral sand concrete
  • A kind of preparation method of modified coral sand concrete
  • A kind of preparation method of modified coral sand concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0058] In addition, in order to explore the most suitable water-cement ratio of cement paste, and the mass ratio of coral sand and cement paste, the present invention provides embodiment one as follows:

[0059] Repeat the above steps to explore the coral sand wrapping test, and the results are shown in Table 1. It is preliminarily concluded that a certain amount of coral sand corresponds to the appropriate range of water-cement ratio and the amount of mortar, as well as the difference between primary wrapping and secondary wrapping . Table 2 and Table 3 simply define the evaluation criteria for the thickness of the cement paste package on coral sand and the amount of remaining cement paste. Also, Table 4 and Table 5 show the titration results of Cl- (chloride ion) precipitation. Therefore, through a series of investigations of embodiment one, what the present invention finally chose is that the water-cement ratio of cement slurry is 0.4, and the mass ratio of coral sand and ...

Embodiment 2

[0074] Simultaneously, utilize above-mentioned steps to obtain the performance of concrete test block in order to test, the present invention provides embodiment two as follows:

[0075] 1. Get a certain amount of broken coral aggregate, deionized water, fast hardening and early strength according to the test ratio of Example 1 (coral sand 100g, cement slurry amount 75g, water-cement ratio 0.4, cement will be divided into two equal parts) High alumina phase cement (divided into 2 equal parts), standard sand;

[0076] 2. Mix half of the cement with deionized water to make a slurry, and stir evenly;

[0077] 3. Pour the aggregate into the slurry for stirring. After a period of time, pour the other half of the cement into the mixer for stirring. After stirring evenly, carry out maintenance;

[0078] 4. Use the wrapped aggregate to pour the test block. There are three samples in each group, and the size of the test block is 40X40X160mm. The comparative test data obtained are show...

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Abstract

The invention discloses a preparation method of modified coral sand concrete, which comprises the steps of: selecting a predetermined amount of coral sand and performing crushing treatment; configuring cement slurry and wrapping the broken coral sand to form wrapped sand; curing the wrapped sand ; Use the cured wrapped sand as aggregate, and pour it to form coral sand concrete. The coral sand concrete prepared by the invention can not only enhance the compressive and flexural resistance of the coral sand aggregate concrete, but also can effectively delay or even restrict the extravasation of chloride ions in the coral sand, thereby effectively protecting the steel bars in the concrete and improving the Service life of concrete structures.

Description

technical field [0001] The invention relates to the technical field of durability of concrete materials, in particular to a preparation method of modified coral sand concrete. Background technique [0002] With the development of society and economy, combined with the actual situation of our country: land resources are not enough to meet the current development needs, so the development of islands and the construction of islands have important strategic significance for the development of my country's society and economy. However, since the islands and reefs are distributed near the coast and far away from the mainland, the transportation is inconvenient and the resources on the island are limited. If a building is built on an island, a series of issues such as construction cost, source of building materials, and construction period must be considered, which poses a challenge to development and construction. Construction posed certain difficulties. [0003] Countries such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/10C04B28/00C04B14/28C04B111/26
CPCC04B20/1077C04B28/00C04B2111/26C04B14/28
Inventor 王耀城闵冲江雪雷李周义杨文根邢锋李龙元白云
Owner SHENZHEN UNIV
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