Anti-freezing concrete and preparation method thereof
A concrete and steel fiber technology, applied in the field of concrete, can solve the problems of concrete frost resistance, easy sinking to the bottom of concrete, uneven distribution of steel fibers, etc. Performance-enhancing, evenly distributed effects
Inactive Publication Date: 2021-10-29
西安市临潼区大秦物流市场开发有限公司
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Problems solved by technology
[0004] In view of the related technologies mentioned above, the inventor believes that the first solution improves the frost resistance of the concrete by adding steel fibers to the plain concrete. However, the density of the steel fibers is high, and it is easy to sink to the bottom of the concrete during construction, causing the steel fibers to The distribution is uneven, and the antifreeze performance of concrete needs to be improved; the second option is to add polypropylene fibers to plain concrete to enhance the antifreeze effect of concrete. However, polypropylene fibers are flexible materials, which are easy to form agglomerates and disperse when stirring poor performance, the frost resistance of concrete needs to be improved
Method used
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Examples
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preparation example 1
[0044] Modified steel fiber, its preparation method comprises the following steps: after cleaning steel fiber with deionized water, dry for subsequent use, steel fiber is flat steel fiber, and the diameter of steel fiber is 0.3mm, and length is 15mm; The propylene material is heated and melted at a constant temperature of 225°C; the cleaned steel fiber is added to the melted polypropylene material, and the polypropylene is commercially available random copolymerized polypropylene, dipped for 10 minutes, the steel fiber is taken out, cooled to room temperature, and the improved High-strength steel fibers, the thickness of the polypropylene layer is 10μm.
preparation example 2
[0046] The modified steel fiber differs from Preparation Example 1 in that the length of the steel fiber is 20 mm.
preparation example 3
[0048] The modified steel fiber differs from Preparation Example 1 in that the length of the steel fiber is 30 mm.
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Abstract
The invention relates to the field of concrete, and particularly discloses anti-freezing concrete and a preparation method thereof.The anti-freezing concrete is prepared from, by weight, 190-210 parts of cement; 50 to 70 parts of mineral powder; 25 to 35 parts of fly ash; 55-65 parts of stone powder; 600 to 610 parts of machine-made sand; 270 to 290 parts of river sand; 950 to 1050 parts of broken stone; 8-10 parts of a pumping agent; 20 to 40 parts of modified steel fibers; and 160 to 180 parts of water; and the modified steel fibers are steel fibers with the surfaces coated with polypropylene layers. By adding the modified steel fibers, the effect of improving the frost resistance and compressive strength of the concrete is achieved.
Description
technical field [0001] The invention relates to the field of concrete, in particular to a frost-resistant concrete and a preparation method thereof. Background technique [0002] Concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate, mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. When concrete is used in cold northern regions, it not only needs to withstand low temperatures for a long time, but also has to withstand the test of repeated freezing and thawing. In order to meet this demand, frost-resistant concrete has emerged as the times require, and frost-resistant concrete has the durability of long-term resistance to freeze-thaw cycles. [0003] A freeze-thaw resistant concrete is disclosed in the related art, which includes the following raw material components in parts by weight: 320-400 parts of cement, 1100-1350 parts of coarse aggregate, 15-35 parts...
Claims
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IPC IPC(8): C04B28/04C04B20/10C04B20/02C04B14/48C04B111/20
CPCC04B28/04C04B20/1033C04B20/023C04B20/02C04B2111/29C04B2201/50C04B18/141C04B18/08C04B14/02C04B14/06C04B14/068C04B2103/0068C04B14/48
Inventor 吴双领侯航
Owner 西安市临潼区大秦物流市场开发有限公司