Concrete highly doped with mineral powder and preparation method thereof
A technology of concrete and slag powder, which is applied in the field of high-slag-mixed concrete and its preparation, can solve the problems of small ultimate elongation, low flexural strength, easy shrinkage and cracking, etc., to reduce temperature difference cracks, reduce cement consumption, and improve bleeding Effect of water separation and workability
Pending Publication Date: 2021-11-16
杭州华杰商品混凝土有限公司
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Problems solved by technology
Ordinary concrete has high compressive strength and high rigidity, but it has disadvantages such as easy shrinkage and cracking, low flexural strength, poor toughness, and small ultimate elongation during gelation and hardening, and these shortcomings increase with the increase of concrete strength. and become more and more obvious
Method used
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Effect test
Embodiment 1
[0033] The preparation of embodiment 1 concrete slag powder
[0034] The slag powder used in the concrete of the present invention is S105 grade slag powder with a particle size distribution of 1-13 μm, D50: 3-5 μm, and a specific surface area of 800-1000 m2 / kg. Its preparation method is as follows:
[0035] High-fineness, high-activity powder obtained by quenching blast furnace slag with water, drying, grinding and other processes.
Embodiment 2
[0036] Example 2 Preparation of Portland Cement
[0037] The concrete Portland cement used in the present invention is ordinary Portland cement.
[0038] Specifically, it is a hydraulic cementitious material made of Portland cement clinker, 6% to 15% of mixed materials, and an appropriate amount of gypsum.
Embodiment 3
[0039] The preparation of embodiment 3 fly ash
[0040] The concrete fly ash used in the present invention is Class I fly ash with a sieve residue of 45 μm square holes not more than 12% and a loss on ignition not more than 5%.
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The invention discloses concrete highly doped with mineral powder, and belongs to the technical field of concrete production. The concrete highly doped with mineral powder comprises the following components in parts by weight: 400-530 parts of a cementing material, 840-1000 parts of broken stone, 480-600 parts of river sand, 48-52 parts of an exciting agent, 52-62 parts of an expanding agent, 3-7 parts of a water reducing agent and 80-96 parts of water, wherein the cementing material is composed of ordinary Portland cement, slag powder and fly ash, the slag powder accounts for 42-63% of the total mass of the cementing material, and the fly ash accounts for 15-20% of the total mass of the cementing material. The slag powder and the fly ash are doped into the concrete, so that temperature difference cracks caused by cement hydration can be reduced, the integrity of a concrete structure is improved, and the durability of the concrete is improved; by utilizing industrial wastes such as mineral powder and fly ash, the cement consumption in the premixed concrete is reduced, the cost is reduced, and energy conservation and environmental protection are realized.
Description
technical field [0001] The invention belongs to the technical field of concrete production, in particular to a high-mixed mineral powder concrete and a preparation method thereof. Background technique [0002] As one of the most widely used building materials in China, concrete has an important existence value in the entire construction industry. Ordinary concrete has high compressive strength and high stiffness, but it has shortcomings such as easy shrinkage and cracking during the cementation and hardening process, low flexural strength, poor toughness, and small ultimate elongation, and these shortcomings increase with the increase of concrete strength. become more and more obvious. [0003] The rapid development of high-performance concrete in recent years has led to a large number of applications of mineral powder admixtures. Especially in commercial concrete, mineral admixtures have become an indispensable component. At present, the most widely used slag powder and f...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B18/141C04B14/06C04B14/02C04B2103/302C04B2103/10C04B2103/0068
Inventor 张政刚刁子祥
Owner 杭州华杰商品混凝土有限公司