Concrete prepared from artificial sand and stone powder
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A concrete and artificial sand technology, applied in the field of concrete, can solve the problems of concrete work performance and compressive strength, etc., achieve good environmental and economic benefits, reduce costs, and reduce consumption
Inactive Publication Date: 2018-06-22
JINAN UNIVERSITY
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[0003] However, the use of artificial sand to completely replace natural river sand has a certain impact on the working performance and compressive strength of concrete.
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Embodiment 1
[0029] Prepare 4 groups of concrete according to the following raw materials and dosage. The raw materials are: 272kg of cement, 68kg of fly ash, 1000kg of crushed stone, 205kg of water, 1.02kg of water reducing agent, of which the amount of river sand or admixture is 817kg, When artificial sand and stone powder are used, the mass ratio of stone powder in the admixture is 5%, 10%, and 15%. The admixture composed of artificial sand and stone powder is fine aggregate, the coarse aggregate is crushed stone, and the mass ratio of admixture to aggregate (the sum of fine aggregate and coarse aggregate) is 45%.
[0030] The test mix ratio of this example is mainly designed for building concrete prefabricated parts, and the strength of concrete used for prefabricated building components is generally lower than C50. Therefore, what this embodiment prepares is the concrete of C30 mark. The specific raw materials used in the 4 groups of concrete are shown in Table 2.
[0031] Table 2 C...
Embodiment 2
[0039] Prepare 4 groups of C45 concrete according to the following raw materials and dosage. Raw materials: 380kg of cement, 95 kg of fly ash, 1007kg of gravel, 190kg of water, 2.38kg of water reducing agent, of which the amount of river sand or admixture is 699kg , when artificial sand and stone powder are used, the mass ratio of stone powder in the admixture is 5%, 10%, and 15%.
[0040] The specific raw materials used in the 4 groups of concrete are shown in Table 4.
[0041] Table 4 C45 Concrete Mix Design
[0042]
[0043] The working performance and compressive strength of the four groups of concrete prepared above were tested, and the results are shown in Table 5.
[0044] Table 5 concrete working performance and compressive strength
[0045]
[0046] From the above Table 4 and Table 5, it can be seen that from the perspective of 3d and 7d compressive strength, the compressive strength of B1~B3 group concrete is generally slightly higher than that of B0 group, and...
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Abstract
The invention discloses concrete prepared from artificial sand and stone powder. The concrete is prepared from the following raw materials in parts by mass: 340 to 480 parts of gel materials, 690 to 820 parts of mixed materials, 990 to 1100 parts of coarse aggregates,190 to 210 pats of water and 1 to 3 parts of water reducing agents, wherein the gel materials are prepared from cement and fly ash;the mixed materials are prepared from artificial sand and stone powder. The artificial sand and the stone powder are used as concrete mixed materials; the consumption of natural river sand is reduced;the cost of a building prefabricated element can be reduced; the environment influence due to excessive exploitation of natural sand can be reduced; meanwhile, by selecting the consumption of the artificial sand and the stone powder, the concrete is enabled to have relatively good work performance and pressure-resistant intensity; the pressure-resistant intensity and the cracking pulling resistant intensity are a little higher than the concrete prepared from natural river sand; in addition, the artificial sand and the stone powder are used as the mixed materials; the concrete shrinkage is reduced; the concrete carbonization resistant and chloride ion seepage resistant performance is improved.
Description
technical field [0001] The invention belongs to the field of building materials, and more specifically relates to concrete prepared by using artificial sand and stone powder. Background technique [0002] With the advancement of science and technology, the requirements for environmental protection, quality and efficiency of building materials are gradually increasing. my country has begun to introduce advanced construction production models from developed countries, the most popular of which is housing industrialization. The state clearly proposes to promote the industrialization of buildings, promote the prefabricated concrete building system suitable for industrialized production, and clearly requires to accelerate the development of prefabricated assembly technology and improve the integration level of construction industrialization technology. The biggest feature of housing industrialization is the extensive use of prefabricated structures. Prefabricated concrete is the...
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