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A permeable concrete and early-strength technology, applied in the field of urban pavement structure, can solve problems such as weak innovation, achieve the effects of reducing sensitivity, reducing dosage, and improving water permeability
Active Publication Date: 2020-02-14
HUBEI UNIV OF TECH
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[0008] The enhancers and high-strength components used in the above patents are all common early strength agents in the field of admixture systems, and the preparation process used is also in the industry design guidelines, and the innovation is not strong
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Embodiment 2
[0041] An early-strength binder for permeable concrete, its raw material formula includes the following components in weight percentage:
[0042] P.O52.5: 33.4%;
[0043] The composition is CaO: 60wt%, Al 2 o 3 : 25wt%, Fe 2 o 3 : 15wt% high-iron calcium aluminate cement: 18%;
[0044] Specific surface area 852m2 / kg ultrafine mineral powder: 27%;
[0045] Ferrous sulfate: 17%;
[0046] Wenlun glue: 0.6%;
[0047] Calcium bentonite: 1.3%;
[0048] Melamine superplasticizer powder: 0.7%;
[0049] Magnesium Stearate: 2.0%.
Embodiment 3
[0051] An early-strength binder for permeable concrete, its raw material formula includes the following components in weight percentage:
[0052] P.O42.5: 41%;
[0053] The composition is CaO: 62wt%, Al 2 o 3 : 23wt%, Fe 2 o 3 : 15wt% high-iron calcium aluminate cement: 11%;
[0054] Specific surface area 918m 2 / kg ultrafine mineral powder: 24%;
[0055] Zinc sulfate: 15%;
[0056] Natural gum: 1.7%;
[0057] Calcium bentonite: 2.2%;
[0058] Melamine superplasticizer powder: 1.0%;
[0059] Zinc stearate: 4.1%.
Embodiment 4
[0061] An early-strength binder for permeable concrete, its raw material formula includes the following components in weight percentage:
[0062] P.O52.5R: 48.5%;
[0063] The composition is CaO: 64wt%, Al 2 o 3 : 23wt%, Fe 2 o 3 : 13wt% high iron type calcium aluminate cement: 13%;
[0064] Specific surface area 863m 2 / kg ultrafine mineral powder: 19%;
[0065] Magnesium sulfate: 12%;
[0066] Wenlun rubber: 1.9%;
[0067] Sodium bentonite: 3.1%;
[0068] Melamine superplasticizer powder: 0.5%;
[0069] Aluminum stearate: 2.0%.
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Abstract
The invention belongs to the technical field of building materials and particularly relates to an early strength cementing material for water-permeable concrete, comprising, by weight according to theformula of materials, 30-55% of ordinary Portland cement, 10-20% of high-iron calcium aluminate cement, 15-30% of micronized mineral powder, 10-20% of metal sulfates, 0.5-2.5% of a water-soluble flocculant, 1-5% of water-absorbing expandable organic material, 0.5-2.0% of melamine water reducer powder, and 2-7% of a lubricant. The high-iron calcium aluminate cement and the metal sulfates cooperateto improve 3d strength; the micronized mineral powder and the ordinary Portland cement can cooperate to improve 28d strength; the water-absorbing expandable organic material and the water-soluble flocculant can cooperate to improve wrapping property and water-holding capacity of concrete; the melamine water reducer powder and the lubricant can ensure low slump and mobility of water-permeable concrete.
Description
technical field [0001] The invention belongs to the technical field of urban pavement structures, and relates to an early-strength cementing material for permeable concrete, which is used for lightweight roads such as sidewalks, light carriageways, ground decoration, landscape roads, city squares, stadiums, fire exits, and parking lots. project. Background technique [0002] With the continuous development of urban modernization, the urban heat island effect is significant. High temperature accelerates photochemical reactions, aggravates air pollution, and damages human health. The city is covered by reinforced concrete, which has poor water and air permeability, resulting in poor breathability of the road surface and poor penetration of rainwater. Permeable concrete has a porous structure, which can improve the situation of low groundwater level, increase urban groundwater resources, improve the city's climate, and improve the environment. At present, pervious concrete ha...
Claims
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Application Information
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