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A kind of recycled concrete and preparation method thereof
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A technology of recycled concrete and recycled coarse aggregate, applied in the field of building materials, can solve the problems of weakened durability of recycled concrete, increased porosity of recycled concrete, and easy cracks, etc., to reduce porosity, improve water seepage resistance, The effect of reducing cracks
Active Publication Date: 2022-07-19
厦门美益兴业建材有限公司
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Problems solved by technology
[0004] However, concrete blocks are prone to cracks when they are broken, resulting in larger porosity of recycled concrete, resulting in stronger water absorption of recycled concrete, resulting in easy cracking, and weakened durability of recycled concrete
Method used
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preparation example 1
[0036] A modified water repellent is prepared through the following steps:
[0037] S1, take by weighing 1Kg paraffin, add it in the reactor and be heated to be in molten state;
[0038] S2, stir the paraffin PE wax liquid by rotating the shaft and slowly add 1Kg of starch grafted acrylic resin, and stir until it is evenly dispersed;
[0039] S3, adding the solution in S2 into the spray granulator for granulation, and obtaining primary product after drying and cooling;
[0040] S4. The primary product is added to drinking water and sieved to obtain the modified water repellent. The mesh number of the sieve is 155 meshes.
preparation example 2
[0042] A modified water repellent is prepared through the following steps:
[0043] S1, take by weighing 1Kg PE wax, add it into the reactor and heat it to be in a molten state;
[0044] S2. Stir the paraffin PE wax liquid by rotating the shaft and slowly add 1.2Kg of cellulose-grafted acrylic resin, and stir until it is evenly dispersed;
[0045] S3, adding the solution in S2 into the spray granulator for granulation, and obtaining primary product after drying and cooling;
[0046] S4. The primary product is added to drinking water and sieved to obtain the modified water repellent. The mesh number of the sieve is 155 meshes.
preparation example 3
[0048] A modified water repellent is prepared through the following steps:
[0049] S1, take by weighing 1Kg paraffin, add it in the reactor and be heated to be in molten state;
[0050] S2. Stir the paraffin PE wax liquid by rotating the shaft and slowly add 1.4Kg of protein graft copolymer resin, and stir until it is evenly dispersed;
[0051]S3, adding the solution in S2 into the spray granulator for granulation, and obtaining primary product after drying and cooling;
[0052] S4. The primary product is added to drinking water and sieved to obtain the modified water repellent. The mesh number of the sieve is 155 meshes.
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Abstract
The present application relates to the field of building materials, and specifically discloses a recycled concrete and a preparation method thereof. The recycled concrete comprises the following components in parts by weight: 4.5-8.5 parts of water; 25-30 parts of Portland cement; 1.7-2.4 parts of fly ash; 1.6-2.5 parts of mineral powder; 10-20 parts of recycled coarse aggregate; 1-2 parts of modified water-repellent agent; 0.5-1.5 parts of water-reducing agent; the modified water-repellent agent comprises an inner core and an outer shell wrapped on the outer side wall of the inner core, the inner core is a water-swellable material, and the outer shell is a wax micropowder; The preparation method is as follows: S1, the configuration of the regenerated coarse aggregate; S2, the pretreatment of the regenerated coarse aggregate; S2, the regenerated coarse aggregate in S1 is placed for 30-60min; S4, the water, Portland cement, powder Coal ash, mineral powder, recycled coarse aggregate, modified waterproofing agent and water reducing agent are mixed and stirred evenly to obtain recycled concrete. The recycled concrete of the present application can be used to reduce the water absorption of the recycled aggregate and improve the crack resistance of the recycled concrete, thereby prolonging the service life of the recycled concrete.
Description
technical field [0001] The present application relates to the field of building materials, and more particularly, to a recycled concrete and a preparation method thereof. Background technique [0002] With the development of society, there are more and more buildings and construction projects of various types. However, with the transformation of the city, a large number of construction wastes are formed from abandoned buildings in the city. The disposal of these construction wastes not only requires a large area of storage yard, And it also costs a lot of manpower and material resources. With the development of construction science, the effective utilization of construction waste has become a new topic. [0003] In the prior art, the construction waste formed by the waste building concrete is crushed to form recycled concrete for recycling, which not only disposes of a large amount of construction waste, but also saves construction materials. Among them, recycled concret...
Claims
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Application Information
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