CN1558032A - Manufacturing method of high-porosity permeable concrete pavement containing active minerals - Google Patents

Abstract

The present invention relates to a kind of manufacturing method of high-strength porous concrete pavement containing active mineral. Cement, fly ash, and water reducer are added to the above mixture, and the weight ratio of concrete preparation is: mixture: cement: fly ash: water = 1: 0.136: 0.024: 0.0313. Stir the above-mentioned preparations evenly, and then add a water reducer to make the cement slurry in it fluid, so that the cement slurry and the preparation are stirred evenly, and the time is 4 minutes to obtain a concrete mixture; pour the above-mentioned concrete mixture into the mold In the middle, it was formed by vibration, and the formwork was removed after 24 hours to obtain a permeable concrete floor material. The invention solves the difficult problem of high-strength and durable use requirements of permeable concrete.

Description

Manufacturing method of high-porosity permeable concrete pavement containing active minerals

technical field

The invention relates to a method for manufacturing a high-strength porous concrete pavement containing active minerals.

Background technique

How to achieve water permeability, reduce noise, and improve driving quality on roads, open-air parking lots, sidewalks and other road surfaces is an urgent problem to be solved in many countries in the world today. At present, the commonly used porous pavement materials are divided into two categories: asphalt-based and cement-based. Asphalt-based porous pavement materials have poor heat resistance and strength, pollute the environment, and have a short service life. Compared with asphalt-based porous pavement materials, cement-based porous pavement materials have the advantages of stable performance after permeation and humidity, no release of harmful chemicals into the road environment, stable volume, and strong durability. However, the strength of cement-based porous pavement materials is low, and the compressive strength is in the range of 15Mpa to 25Mpa, which is difficult to further improve, thus hindering the popularization and application of cement-based porous pavement materials. Although some countries use organic reinforcing components such as vinyl acetate-ethylene copolymer emulsion, polyvinyl formal, or SBR rubber emulsion to enhance the strength of cement-based porous pavement materials, but due to the poor weather resistance of organic reinforcing components, Aging easily and expensive. Therefore, the addition of organic reinforcing components still cannot meet the high-strength and durable requirements of pervious concrete. Therefore, how to meet the high-strength and durable requirements of pervious concrete is an urgent problem that scientists and researchers from all over the world need to solve.

Contents of the invention

The purpose of the present invention is to provide a method for manufacturing a high-porosity permeable concrete pavement containing active minerals, which can meet the requirements of porous concrete, low cost, high strength and durability.

A kind of manufacturing method of the high-strength permeable concrete pavement containing active minerals of the present invention is composed of the following steps:

(1) preparation of compound, the weight ratio of compound is:

gravel: sand: water = 1: 0.1～0.3: 0.01～0.04

Stir the above mixture evenly in a mixer for 2 to 4 minutes, the stones are natural pebbles or crushed stones with a particle size of 5 to 40 mm, and the fineness modulus of the sand is 1.6 to 3.2;

(2) The preparation of concrete, add cement, active mineral admixture, water reducing agent in the above-mentioned mixture, the weight ratio of concrete preparation is:

Mixture: cement: active mineral admixture: water = 1: 0.1～0.4: 0.008～0.050: 0.02～0.08

Stir the above-mentioned preparations evenly, then add a water reducer to make the cement slurry in it fluid, and then stir evenly for 3 to 5 minutes to obtain a concrete mixture;

(3) Pour the above-mentioned concrete mixture into a mold, vibrate and form it, and remove the mold after 24 hours to obtain a permeable concrete floor tile, or pour the above-mentioned concrete mixture into a roadbed construction, and roll it into shape to obtain a permeable concrete pavement ;

(4) Curing, the permeable concrete floor tiles obtained above, or the permeable concrete pavement, are kept moist at a temperature of 15° C. to 25° C. for 7 to 15 days.

The water reducer can be any one of naphthalene water reducer, water-soluble resin water reducer, lignin water reducer, molasses water reducer, or any combination of several. The added amount of the water reducer is 0.5-3% of the added weight of cement. For example, naphthalene superplasticizer can choose NF, lignin superplasticizer can choose calcium lignosulfonate, water-soluble resin superplasticizer can choose melamine resin sodium sulfonate, etc.

The active mineral admixture can be any one of fly ash, silicon powder, water-quenched slag, pozzolanic slag, pozzolanic material, and sintered soil, or any combination of several kinds.

Method of the present invention has following advantage:

1. The present invention solves the difficult problem of high-strength and durable use requirements of permeable concrete.

2. The permeable concrete prepared by the method of the present invention has high strength, durability and water permeability. The 28-day compressive strength reaches 30-50Mpa, the number of water-permeable strands reaches 1.0-10.0mm/s, and the apparent density is 1900-2300kg/ ^m3 . The high strength of this kind of permeable porous concrete is obtained through the bonding of various inorganic materials, without any organic reinforcing materials, and the use cost is low.

3. The present invention has the advantages of being simple and easy to operate, and at the same time, it is beneficial to make full use of water resources, protect and increase groundwater, eliminate road surface water, improve road traffic comfort and safety, reduce road traffic noise and protect the environment.

Detailed ways

The weight proportion of mixture is: stone: sand: water=1: 0.265: 0.020, and stone is natural pebble, and its particle diameter is 5～25mm, and sand is river sand, and fineness modulus is 3.11, and above-mentioned mixture is in Mix well in a blender for 3 minutes. Then add cement, fly ash, and water reducer to the above mixture, and the weight ratio of concrete preparation is: mixture: cement: fly ash: water=1: 0.136: 0.024: 0.0313. Stir the above-mentioned preparations evenly, and then add a water reducing agent-calcium lignosulfonate accounting for 2% by weight of the cement, so that the cement slurry therein can generate fluidity, so that the cement slurry and the preparations are stirred evenly, and the time is 4 minutes. Concrete mixture: pour the above concrete mixture into a mold, vibrate and form it, and remove the mold after 24 hours to obtain a permeable concrete floor tile. The permeable concrete floor tile obtained above is kept at a temperature of 15°C to 25°C for moisturizing and curing. Time 7th. The measured apparent density of permeable concrete floor tiles is 2259kg/m ³ , the 28-day compressive strength reaches 43.1Mpa, and the water permeability reaches 2.0mm/s.

Claims (4)

1, a kind of manufacture method that contains the high-strength macropore pervious concrete pavement of active mineral matter is characterized in that this method is to be made of following steps:

(1) preparation of compound, the weight proportion of compound be,

Stone: sand: water=1: 0.1～0.3: 0.01～0.04

Above-mentioned compound is stirred in mixer, and 2～4 minutes time, described stone is a natural pebble, or its particle diameter of rubble is 5～40mm, and the fineness modulus of sand is 1.6～3.2;

(2) concrete preparation adds cement, active mineral admixture, water reducing agent in above-mentioned compound, the weight proportion of concrete preparation is,

Compound: cement: active mineral admixture: water=1: 0.1～0.4: 0.008～0.050: 0.02～0.08

Above-mentioned formulation is stirred, add water reducing agent again, make cement paste wherein produce flowability, stir again, 3～5 minutes time, obtain concrete mix;

(3) with in the above-mentioned concrete mix casting mold, moulding is smash in shake, and form removal after 24 hours obtains the pervious concrete paving brick, or above-mentioned concrete mix is cast in the subgrade construction, and roller-compaction obtains pervious concrete pavement;

(4) maintenance obtains the pervious concrete paving brick with above-mentioned, or pervious concrete pavement, in 15 ℃～25 ℃ of temperature, moisture-keeping maintaining, 7～15 days time.

2, the manufacture method that contains the high-strength macropore pervious concrete pavement of active mineral matter according to claim 1, it is characterized in that: described water reducing agent can be choosing any one kind of them in naphthalene yarn water reducing agent, water-soluble resin yarn water reducing agent, lignin yarn water reducing agent, the molasses based water reducer, or several any combination.

3, the manufacture method that contains the high-strength macropore pervious concrete pavement of active mineral matter according to claim 1, it is characterized in that: described active mineral admixture can be choosing any one kind of them in flyash, silica flour, water-granulated slag, volcano lime-ash, pozzolanic materials, the sintering soil, or several any combination.

4, the manufacture method that contains the high-strength macropore pervious concrete pavement of active mineral matter according to claim 1 is characterized in that: the addition of described water reducing agent is to account for cement to add 0.5～3% of weight.