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Low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete and preparation method thereof

An ultra-high-performance, low-shrinkage technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of complex preparation process, large investment, high production cost, etc. Simplicity and the effect of reducing production costs

Inactive Publication Date: 2017-10-03
CCCC SECOND HARBOR ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the preparation and application of ultra-high performance concrete developed in China: (1) The preparation process is complicated
(2) High production cost
Different from ordinary concrete, the main raw materials used in the preparation of ultra-high performance concrete include cement, silica fume, quartz sand, fine steel fibers, high-efficiency water reducers, etc. The high cost of raw materials requires a large investment, the promotion and application of ultra-high performance concrete are restricted

Method used

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  • Low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete and preparation method thereof
  • Low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0026] An ultra-high performance concrete, comprising the following ingredients by weight: 773 parts of cement, 50 parts of fly ash bleaching beads, 187 parts of silica fume, 30 parts of metakaolin, 30 parts of phosphogypsum, 50 parts of expansion agent, river sand 1120 parts, 157 parts of fine steel fiber, 190 parts of water and 16 parts of polycarboxylate high-performance water reducer.

Embodiment 3

[0028] An ultra-high performance concrete, comprising the following ingredients by weight: 672 parts of cement, 93 parts of fly ash bleaching beads, 187 parts of silica fume, 42 parts of metakaolin, 42 parts of phosphogypsum, 84 parts of expansion agent, river sand 1120 parts, 157 parts of fine steel fiber, 190 parts of water and 16 parts of polycarboxylate high-performance water reducer.

Embodiment 4

[0030] For the batching of Comparative Example 1, Example 2, and Example 3, ultra-high performance concrete was prepared according to the following steps.

[0031] At room temperature of 20±3°C, mix well-graded river sand and fine steel fibers to obtain component A; mix cement, fly ash beads, silica fume, metakaolin, phosphogypsum and expansion agent to obtain Component B: mix polycarboxylate high-performance water reducer with water to obtain component C; first place component A in a horizontal shaft concrete mixer and mix for 60 seconds, then add component B and mix 60 seconds, then add component C into the blender and stir for 6-8 minutes, and finally adopt standard curing to get the finished product.

[0032] For the ingredients of Comparative Example 1, Example 2, and Example 3, the ultra-high performance concrete prepared according to the method of Example 4 was tested, and the test results are shown in Table 1. It should be noted that the same components in all the exa...

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Abstract

The invention discloses a low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete, and relates to a novel material. The low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete is prepared from the following ingredients in parts by weight: 650 to 800 parts of cement, 50 to 100 parts of fly-ash floating beads, 150 to 200 parts of silica fume, 30 to 50 parts of metakaolin, 30 to 50 parts of phosphogypsum, 50 to 100 parts of expansive agent, 1100 to 1200 parts of fine aggregate, 100 to 200 parts of fine steel fiber, 150 to 250 parts of water, and 10 to 20 parts of polycarboxylate superplasticizer; and the invention also discloses a method for preparing the low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete. According to the invention, the preparation technology is simple, the low-viscosity low-shrinkage steam-curing-free ultra-high performance concrete can be prepared by a conventional process, and a hot curing system is not needed, so that a purpose of no steam-curing is achieved.

Description

technical field [0001] The present invention relates to a new type of material. More specifically, the invention relates to a low-viscosity, low-shrinkage, non-steam-cured ultra-high performance concrete and a preparation method thereof. Background technique [0002] Ultra-High Performance Concrete (UHPC for short), which is different from traditional high-strength concrete (HSC) and steel fiber reinforced concrete (SFRC), refers to mechanical properties, durability and other properties that are far superior to ordinary concrete and A new type of cement-based engineering material of high-performance concrete. However, there are still many problems in the preparation and application of ultra-high performance concrete developed in China: (1) The preparation process is complicated. Ultra-high performance concrete is prepared according to the theory of maximum density, and the particle size of the raw materials should be optimized during preparation so that the raw materials c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/08
CPCC04B28/04C04B2201/52C04B2201/50C04B18/082C04B14/106C04B18/146C04B22/144C04B14/48C04B2103/302C04B14/068C04B22/064C04B22/066Y02W30/91
Inventor 张国志张永涛陈飞翔陈鸣游新鹏王敏黄灿彭成明郑和晖巫兴发陈少林曹志田飞
Owner CCCC SECOND HARBOR ENG
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