Steam-curing-free low-cost ultra-high performance concrete and preparation method thereof

An ultra-high performance, low-cost technology, applied in the field of building materials, can solve the problems of high cost and complicated maintenance of ultra-high performance concrete, and achieve the effect of increasing physical and mechanical properties and working performance, improving physical and mechanical properties, and improving early strength.

Pending Publication Date: 2022-04-29
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] One of the purposes of the present invention is to provide a steam-free low-cost ultra-high performance concrete, which solves the problems of high cost and cumbersome maintenance of ultra-high performance concrete in the prior art

Method used

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  • Steam-curing-free low-cost ultra-high performance concrete and preparation method thereof
  • Steam-curing-free low-cost ultra-high performance concrete and preparation method thereof
  • Steam-curing-free low-cost ultra-high performance concrete and preparation method thereof

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Effect test

Embodiment 1

[0048] This embodiment discloses the preparation method of the steam-free low-cost ultra-high performance concrete of the present invention, specifically:

[0049] Step 1. Weigh 5500g of ordinary Portland cement, 500g of fast-hardening sulfoaluminate cement, 1500g of mineral powder, 1000g of silica fume, 1500g of fly ash, 1500g of limestone powder, 11500g of machine-made sand, 1400g of waste steel fiber, and water reducing agent 100g, water 1800g;

[0050] Step 2. First add ordinary Portland cement, rapid hardening sulfoaluminate cement, silica fume, fly ash, mineral powder, limestone powder and machine-made sand into the forced mixer for dry mixing for 3 minutes, and mix the water reducing agent and 900g of water evenly Finally, add the mixer and stir evenly, then add the remaining water into the mixer and stir, and at the same time, sprinkle steel fibers evenly and stir evenly, that is, steam-free low-cost ultra-high performance concrete.

Embodiment 2

[0052] This embodiment discloses the preparation method of the steam-free low-cost ultra-high performance concrete of the present invention, specifically:

[0053] Step 1. Weigh 4500g of ordinary Portland cement, 1500g of fast-hardening sulfoaluminate cement, 1000g of mineral powder, 500g of silica fume, 2500g of fly ash, 2000g of limestone powder, 8000g of machine-made sand, 1800g of waste steel fiber, and water reducing agent 100g, water 1700g;

[0054] Step 2. First add ordinary Portland cement, rapid hardening sulfoaluminate cement, silica fume, fly ash, mineral powder, limestone powder and machine-made sand into the forced mixer for dry mixing for 3 minutes, and mix the water reducing agent and 850g of water evenly Finally, add the mixer and stir evenly, then add the remaining water into the mixer and stir, and at the same time, sprinkle steel fibers evenly and stir evenly, that is, steam-free low-cost ultra-high performance concrete.

Embodiment 3

[0056] This embodiment discloses the preparation method of the steam-free low-cost ultra-high performance concrete of the present invention, specifically:

[0057] Step 1. Weigh 5000g of ordinary Portland cement, 1000g of fast-hardening sulfoaluminate cement, 500g of mineral powder, 1500g of silica fume, 2000g of fly ash, 1000g of limestone powder, 9500g of machine-made sand, 1600g of waste steel fiber, and water reducing agent 150g, water 1900g;

[0058] Step 2. First add ordinary Portland cement, rapid hardening sulfoaluminate cement, silica fume, fly ash, mineral powder, limestone powder and machine-made sand into the forced mixer for dry mixing for 3 minutes, and mix the water reducing agent and 950g of water evenly Finally, add the mixer and stir evenly, then add the remaining water into the mixer and stir, and at the same time, sprinkle steel fibers evenly and stir evenly, that is, steam-free low-cost ultra-high performance concrete.

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Abstract

The invention discloses steam-curing-free low-cost ultra-high performance concrete and a preparation method thereof, relates to the technical field of building materials, and solves the problems of high cost and cumbersome curing of ultra-high performance concrete in the prior art. The steam-curing-free low-cost ultra-high performance concrete is prepared from the following raw materials in parts by weight: 40-55 parts of ordinary Portland cement; 5 to 20 parts of rapid hardening sulphoaluminate cement; 0-15 parts of mineral powder; 5 to 20 parts of silica fume; 15 to 25 parts of fly ash; 5-20 parts of limestone powder; 80 to 125 parts of machine-made sand; 12-18 parts of waste steel fiber; 1-2 parts of a water reducing agent; and 17-20 parts of water. The preparation method of the steam-curing-free low-cost ultra-high performance concrete comprises the following steps: weighing the raw materials in parts by weight; after the raw materials are uniformly mixed, the steam-curing-free low-cost ultra-high performance concrete is obtained. The steam-curing-free low-cost ultra-high performance concrete is low in cost, simple and convenient to produce and excellent in various properties.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a steam-free low-cost ultra-high performance concrete and a preparation method thereof. Background technique [0002] In recent years, with the development of the construction industry, construction projects have gradually moved towards ultra-high heights and ultra-large spans, and the requirements for the mechanical properties of building materials are getting higher and higher. At the same time, as my country's urbanization process continues to advance, more and more severe cold, hot, dry, saline-alkali, sandstorms and other harsh environments need to be built. Construction projects in these harsh environment areas have very strict requirements on the durability of concrete materials. , and the service life of many bridges is often more than a hundred years. The construction industry has higher and higher requirements on the performance of building materials, and man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B14/28C04B14/48C04B18/08C04B18/14B28B11/24
CPCC04B28/06C04B18/08C04B18/141C04B18/146C04B14/48C04B14/28B28B11/245C04B2111/00017C04B2201/50C04B7/02C04B14/06C04B2103/302Y02W30/91
Inventor 腾银见王宁夏艳晴林燕阳黎张雨晴
Owner JIAHUA SPECIAL CEMENT
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