Proportioning method for novel C25 concrete applied to downhole floor pouring

A new type of concrete technology, which is applied in the field of concrete preparation and concrete proportioning, can solve the problems of high compressive strength of concrete, affecting concrete compressive strength, and uneven floor potholes, so as to improve durability, prevent cracks, and improve The effect of service life

Inactive Publication Date: 2018-01-05
NANJING MEISHAN METALLURGY DEV +1
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Problems solved by technology

[0002] In the production process of underground mines, blasting is required to recover ore resources. Potholes and unevenness often appear on the floor of the roadway after blasting. If the floor is not poured in time, the consumption of spare parts such as tires for underground shoveling equipment will be aggravated

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  • Proportioning method for novel C25 concrete applied to downhole floor pouring

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Effect test

Embodiment 1

[0042] A new type of C25 concrete proportioning method for underground floor pouring. The mass ratio of cement, gravity-selected iron tailings, yellow sand, stones, water, high-efficiency water reducer, and steel fiber in the concrete is 396:411:380:793:221 :5:56, the sand is medium-coarse sand, the sand is medium-coarse sand without deducting the water content, the water is the water content without adding sand, the cement is P.042.5 grade cement, and the particle size of the stone is 15mm-20mm. The superplasticizer is Star build HP350 (star standard HP350) high-efficiency concrete superplasticizer (PH value 11.2, density 1.220 / ml, solid content 31.5%, chloride ion content ≦ 1.0%, alkali content ≦ 8.0%, net slurry fluidity ≧ 120mm, mortar water-reducing rate≧18%, product inspection standard conforms to GB / T 8077-2000), steel fiber is long straight steel fiber with circular cross section, length is 40~60mm, diameter is 0.2~0.6mm, long diameter The ratio is 40~100. The slump o...

Embodiment 2

[0044] A new type of C25 concrete proportioning method for underground floor pouring. The mass ratio of cement, gravity-selected iron tailings, yellow sand, stones, water, high-efficiency water reducer and steel fiber in the concrete is 394:412:383:794:222 :4.5:58, the sand is medium-coarse sand, the sand is medium-coarse sand without deducting the water content, the water is the water content without sand, the cement is P.042.5 grade cement, and the particle size of the stone is 15mm-20mm. The superplasticizer is Star build HP350 (star standard HP350) high-efficiency concrete superplasticizer (PH value 11.5, density 1.190 / ml, solid content 31.7%, chloride ion content ≦ 1.0%, alkali content ≦ 8.0%, net slurry fluidity ≧ 120mm, mortar water-reducing rate≧18%, product inspection standard conforms to GB / T 8077-2000), steel fiber is long straight steel fiber with circular cross section, length is 40~60mm, diameter is 0.2~0.6mm, long diameter The ratio is 40~100. The slump of the ...

Embodiment 3

[0046] A new type of C25 concrete proportioning method for underground floor pouring. The mass ratio of cement, gravity-selected iron tailings, yellow sand, stones, water, high-efficiency water reducer and steel fiber in the concrete is 396:414:385:796:220 :4.8:60, the sand is medium-coarse sand, the sand is medium-coarse sand without water content deducted, the water is the water content without sand, the cement is P.042.5 grade cement, and the particle size of the stone is 15mm-20mm. The superplasticizer is Star build HP350 (star standard HP350) high-efficiency concrete superplasticizer (PH value 11.8, density 1.180 / ml, solid content 32.0%, chloride ion content ≦ 1.0%, alkali content ≦ 8.0%, net slurry fluidity ≧ 120mm, mortar water-reducing rate≧18%, product inspection standard conforms to GB / T 8077-2000), steel fiber is long straight steel fiber with circular cross section, length is 40~60mm, diameter is 0.2~0.6mm, long diameter The ratio is 40~100. The slump of the produ...

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Abstract

The invention relates to a proportioning method for novel C25 concrete applied to downhole floor pouring. The method is characterized in that the concrete is cement, gravity-separated iron tailings, yellow sand, cobblestone, water, a high-efficiency water reducer and steel fibers in a mass ratio of (394-400): (410-418): (380-385): (791-800): (220-225): (4-5): (55-60). The method can effectively reduce the usage amount of yellow sand in a reasonable range, so the cost of support production is lowered; and at the same time, the high-performance water reducer and large-proportion steel fibers areintroduced to improve the deformation resistance, compressive strength, abrasion resistance, toughness, impact strength and durability of the concrete.

Description

technical field [0001] The invention relates to a concrete proportioning method, in particular to a novel C25 concrete proportioning method for underground floor pouring, and belongs to the technical field of concrete preparation methods. Background technique [0002] In the production process of underground mines, blasting is required to recover ore resources. Potholes and unevenness often appear on the floor of the roadway after blasting. If the floor is not poured in time, the consumption of spare parts such as tires for underground shoveling equipment will be aggravated, and floor pouring is mainly Concrete using C25 has higher requirements on the compressive strength of concrete. Generally, in the proportion used in the production of C25 concrete, too much yellow sand will lead to increased production costs, and too low yellow sand will affect the compressive strength of concrete. In the gravity separation process of the beneficiation process, the properties of the cast...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 许志逞
Owner NANJING MEISHAN METALLURGY DEV
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