CN101050092A - Method for preparing pervious cement concrete - Google Patents

Abstract

This invention relates to a method for preparing water-permeable cement concrete. The raw materials comprise: steel slag (coarse aggregate) 75-85%, Portland cement (P152.5) 10-20%, amorphous SiO2 (strengthening agent) 4.5-8.5%, and acrylic emulsion or styrene-acrylic emulsion (binder) 0.5-1.5%. The method comprises: weighing the raw materials, and stirring with a stirrer to obtain a solidified body. When used, the solidified body is mixed with water, stirred, poured, rolled, smashed and maintained to obtain water-permeable cement concrete plates, whose compressive strength, porosity and water permeability are 20-30 MPa, 20-25% and 1-20 mm/S, respectively.

Description

The preparation method of cement concrete with water permeability

Technical field

The present invention relates to a kind of preparation method of cement concrete with water permeability, genus cement and bone unexpectedly gluing are main building material technical field.

Background technology

Along with the process of society's The development in society and economy and urban construction, the face of land of modern city is progressively covered by the building construction of Steel Concrete and fluid-tight road surface.Compare with the soil of nature, the concrete road surface lacks respiratory, absorbs the ability of heat and infiltration rainwater, brings a series of environmental problem thereupon.

In the urban construction, not high for requirement of strength, and requirement has the occasion of higher permeable effect, as road, walkway, square, court, Botanical gardens, lightweight road, parking lot, underground structrue engineering and various new sports place etc. in the park, all can consider to use water-permeable water coagulation soil.

The characteristic and the advantage of cement concrete with water permeability are as follows:

(1) Zhuo Yue infiltration function can make rainwater go deep into the face of land rapidly, is reduced into underground water, makes groundwater resource obtain in time replenishing, and keeps soil humidity, improves the life condition of urban surface plant and soil microorganisms and adjusts the eubiosis.

(2) thermal cycling improves function, and water-permeable pavement has bigger porosity, and communicates with soil, can accumulate more heat, helps regulating the temperature and humidity of city space, alleviates heat island phenomenon.

(3) water cycle is improved function, and in ring during rainfall, burden that can the dehydrogenation (-nization) pumping equipment prevents the urban river water flooding, alleviates public waters and pollutes.

(4) walking is comfortable, prevents that surface gathered water and night from being reflective, has improved vehicle, pedestrian's current comfortableness and security.In addition, permeable concrete is owing to there is a large amount of pore holes, and the noise that produces in the time of absorbing vehicle and travel is created quiet comfortable traffic environment.

Summary of the invention

The preparation method of a kind of cement concrete with water permeability of the present invention is characterized in that having following technological process and step:

A. composition of raw materials is determined in design: the raw material moiety and the weight percent proportioning thereof of cement concrete with water permeability are as follows:

Slag as aggregate (coarse aggregate) 75～85%,

Neat portland cement (P152.5) 10～20%,

Amorphous Si O ₂(reinforcer) 4.5～8.5%,

Pure-acrylic emulsion or benzene emulsion (binding agent) 0.5～1.5%;

Above-mentioned amorphous Si O as reinforcer ₂, its SiO ₂Content 〉=96%;

B. claim the carp batching by the above-mentioned raw materials prescription; As the slag as aggregate of coarse aggregate is single-grade, stand-by J just mixes above-mentioned slag as aggregate and gelling material P152.5 neat portland cement after needing in advance purified, pulverizing and fractionated treatment process with High-efficient Stirrer, make to mix, add reinforcer amorphous Si O subsequently ₂And binding agent pure-acrylic emulsion or propyl benzene emulsion, stirring is mixed once more, makes thorough mixing even, forms induration, and this induration is the cement concrete with water permeability starting material;

C. above-mentioned cement concrete with water permeability starting material need operation routinely when concrete constructing operation, its operating process is: add suitable quantity of water-stirring-pallet-cast-roll-in-vibrate-all processes of maintenance; Finally become the cement concrete with water permeability of practical application.

Embodiment

After now embodiments of the invention specifically being described in.

Embodiment one: present embodiment is an example with preparation 100kg cement concrete with water permeability starting material.

The composition of raw materials that adopts is as follows:

Slag as aggregate (coarse aggregate) 78kg

Neat portland cement (P152.5) 15kg

Amorphous Si O ₂(reinforcer) 6.0k

Pure-acrylic emulsion 1.0kg

Above-mentioned slag as aggregate as coarse aggregate is a single-grade, and promptly its particle diameter is 200～300 μ m;

Above-mentioned amorphous Si O as reinforcer ₂, its SiO ₂Content 〉=96%.

Above-mentioned slag as aggregate is mixed with senior stirrer with gelling material P152.5 neat portland cement, make to mix, add reinforcer amorphous Si O subsequently ₂And the binding agent pure-acrylic emulsion, mix once more, make thorough mixing even, form the solid knot, this induration is the cement concrete with water permeability starting material.

Above-mentioned cement concrete with water permeability starting material are made concrete sample, and its operating process is by traditional ordinary method operation, and its process is: adding suitable quantity of water-stirring-pallet-cast-roll-in-vibrate-maintenance.Finally make cement concrete with water permeability plate sample.

The wet time of supporting of permeable concrete plate sample should be no less than 7 days.

The cement concrete with water permeability plate sample that present embodiment makes is tested, and its test result is as follows:

Curing condition	7 days ultimate compression strength (MPa)	28 days ultimate compression strength (MPa)
			Normal curing	17.4	23.6
Natural curing	15.5	20.7
			Maintenance in the water	20.1	28.9

Concrete voidage: 20～25%.

Permeability rate 1～20mm/S.

In addition, once with cement concrete with water permeability as pilot project, at Jiading District An Tingxin town, Shanghai City first phase (Westbound) parking lot, the about 2000m of area ²Ground on, adopted permeable concrete to lay, on-the-spot gained testing data is as shown in the table:

Drill hole sampling	Surface thickness	Numbering	Thickness (cm)	Mean thickness (cm)
					A	13.5	13.75
		B	14
				Ultimate compression strength	Numbering	Ultimate compression strength (MPa)		On average (MPa)
	A	24.8	25.6
					B	26.4
	Tensile splitting strength	Numbering					Split tensile strength (MPa)	On average (MPa)
			A	3.15	3.05
		B				2.95
			In-place forming	Numbering			7d ultimate compression strength (MPa)	28d ultimate compression strength (MPa)	28d folding strength (MPa)
X-1	17.8	24.5			3.07
				X-2		18.4	26.5	3.15
X-3		25.4			3.05

The pilot project explanation, the place of adopting pervious concrete to lay has the actual spendable performance that requires, and its intensity index is than higher.

Claims (1)

1. the preparation method of a cement concrete with water permeability is characterized in that having following technological process and step:

A. composition of raw materials is determined in design: the raw material moiety and the weight percent proportioning thereof of cement concrete with water permeability are as follows:

Slag as aggregate (coarse aggregate) 75～85%,

Neat portland cement (P152.5) 10～20%,

Amorphous Si O ₂(reinforcer) 4.5～8.5%,

Pure-acrylic emulsion or benzene emulsion (binding agent) 0.5～1.5%;

Above-mentioned amorphous Si O as reinforcer ₂, its SiO ₂Content 〉=96%;

B. claim the carp batching by the above-mentioned raw materials prescription; As the slag as aggregate of coarse aggregate is single-grade, stand-by J just mixes above-mentioned slag as aggregate and gelling material P152.5 neat portland cement after needing in advance purified, pulverizing and fractionated treatment process with High-efficient Stirrer, make to mix, add reinforcer amorphous Si O subsequently ₂And binding agent pure-acrylic emulsion or propyl benzene emulsion, stirring is mixed once more, makes thorough mixing even, forms induration, and this induration is the cement concrete with water permeability starting material;

C. above-mentioned cement concrete with water permeability starting material need operation routinely when concrete constructing operation, its operating process is: add suitable quantity of water-stirring-pallet-cast-roll-in-vibrate-all processes of maintenance; Finally become the cement concrete with water permeability of practical application.