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High-strength light aggregate concrete and preparation process thereof

A lightweight aggregate concrete, high-strength technology, applied in the field of concrete, can solve the problems of reduced strength of lightweight aggregate concrete, cracking of concrete layers, difficult work performance, etc. Effect

Inactive Publication Date: 2020-03-31
泸州临港思源混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although lightweight aggregate concrete has become an important development direction of concrete due to its superior performance, due to the low volume density of lightweight aggregate and the rough and porous surface, lightweight aggregate concrete is often prone to aggregates during actual use. Floating, concrete delamination cracking and concrete segregation and other phenomena also reduce the strength of lightweight aggregate concrete, making it difficult to ensure its stable working performance, and at the same time, it also brings great difficulties to construction

Method used

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  • High-strength light aggregate concrete and preparation process thereof
  • High-strength light aggregate concrete and preparation process thereof
  • High-strength light aggregate concrete and preparation process thereof

Examples

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Effect test

preparation example Construction

[0047] Preparation example of polypropylene / graphene oxide composite fiber

[0048] Step 1: Select polypropylene particles, crush them into powder with a plastic crusher, sieve the polypropylene powder with a particle size less than 1mm, and collect them for later use;

[0049] Step 2: Pour the ethanol solution into the polypropylene powder with a particle size of less than 1mm until the ethanol solution is submerged in the polypropylene powder, stir and mix evenly, put it into a ball mill for fine grinding for 8 hours, and set the speed of the ball mill to 100rad / min , after finishing fine grinding, dry it for later use;

[0050]Step 3: Add graphene oxide solution and ethylene solution 1:1 to the polypropylene powder that has been finely ground in step 2 to make a mixed solution, ultrasonic for 0.5h, and continue stirring with a stirrer during the ultrasonic process;

[0051] Step 4: Precipitate the mixed solution obtained by ultrasonic operation in Step 3 for 24 hours;

[...

Embodiment 1

[0057] High-strength lightweight aggregate concrete includes the following weight components: cement 80kg, mineral admixture 110kg, fine aggregate 140kg, shale ceramsite 40kg, water reducing agent 5kg, water 135kg, skeleton fiber 15kg.

[0058] The cement is ordinary Portland cement or sulphoaluminate cement.

[0059] Mineral admixtures include fly ash.

[0060] The fine aggregate is medium sand with a fineness modulus of 2.5-2.8 and a weight of 140kg.

[0061] The water reducer is sodium lignosulfonate or melamine water reducer.

[0062] Skeleton fibers include polypropylene / graphene oxide composite fibers and steel fibers, specifically polypropylene / graphene oxide composite fibers are 5kg and steel fibers are 10kg.

[0063] The preparation process of the skeleton fiber: cut the prepared polypropylene / graphene oxide composite fiber so that the length of the polypropylene / graphene oxide composite fiber is between 12-15mm, screen the steel fiber with a length of 6-9mm, and se...

Embodiment 2

[0066] The difference between Example 2 and Example 1 lies in the different contents of concrete components and the different parameters of the high-strength concrete preparation process.

[0067] See Table 1 and Table 2 for components.

[0068] The preparation process of the skeleton fiber: cut the prepared polypropylene / graphene oxide composite fiber so that the length of the polypropylene / graphene oxide composite fiber is between 12-15mm, screen the steel fiber with a length of 6-9mm, and send to Steel fibers are added to the polypropylene / graphene oxide composite fiber; after the polypropylene / graphene oxide composite fiber and the steel fiber are prepared in proportion, they are stirred and mixed evenly to obtain the skeleton fiber.

[0069] The preparation process of high-strength lightweight aggregate concrete: mix cement, mineral admixture, fine aggregate, shale ceramsite and skeleton fiber in proportion to form a component A mixture for later use; add water reducing a...

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Abstract

The invention discloses high-strength light aggregate concrete and a preparation process thereof. The high-strength light aggregate concrete comprises cement, a mineral admixture, fine aggregate, shale ceramsite, skeleton fibers, a water reducing agent and water, wherein the skeleton fibers comprise polypropylene / graphene oxide composite material fibers and steel fibers, the strength of the concrete can be improved by doping the skeleton fibers in the concrete, and the concrete is more stable in performance and not prone to cracking in the using process. The preparation process disclosed by the invention comprises the following steps: preparing polypropylene / graphene oxide composite material fibers, preparing skeleton fibers and blending the components. According to the preparation processdisclosed by the invention, the polypropylene / graphene oxide composite material fibers which are uniformly mixed and stable in performance can be prepared, and the polypropylene / graphene oxide composite material fibers and the steel fibers are uniformly dispersed in the concrete, so that the stability of the concrete is improved.

Description

technical field [0001] The invention relates to the field of concrete, more specifically, it relates to a high-strength lightweight aggregate concrete and a preparation process thereof. Background technique [0002] Light aggregate concrete refers to lightweight concrete prepared with light aggregate, cement, sand, mineral admixture, water reducing agent and water, which has light weight, good thermal insulation performance, good seismic performance and good fire resistance , Construction adaptability and other characteristics, are widely used in various industrial and civil buildings as well as roads, bridges and other projects. [0003] Although lightweight aggregate concrete has become an important development direction of concrete due to its superior performance, due to the low volume density of lightweight aggregate and the rough and porous surface, lightweight aggregate concrete is often prone to aggregates during actual use. Phenomena such as floating, concrete layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/34C04B111/40
CPCC04B28/02C04B2111/343C04B2111/40C04B2201/50C04B18/08C04B14/06C04B18/027C04B16/0633C04B14/48C04B2103/302
Inventor 罗杨邓小飞张伟
Owner 泸州临港思源混凝土有限公司
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