阅读说明：本技术 一种建筑垃圾再生骨料制备的水下抗分散混凝土 (Underwater anti-dispersion concrete prepared from construction waste recycled aggregate ) 是由 耿冰 盖青山 胡利平 尤春颖 刘军 朱建国 张加奇 于 2019-11-04 设计创作，主要内容包括：本发明涉及一种建筑垃圾再生骨料制备的水下抗分散混凝土,其中包括常规石子、建筑垃圾再生粗骨料、建筑垃圾再生细骨料、特细砂、水泥、矿物掺合料、矿物填料、减水剂、抗分散剂；其中,单位体积内上述物料的质量比例为：常规石子6-8、建筑垃圾再生粗骨料1.5-2.5、建筑垃圾再生细骨料4-5、特细砂3-4、水泥2-4、矿物掺合料0.8-1.8、矿物填料0.1-1、减水剂0.07-0.15,抗分散剂0.001-0.005。本发明所述建筑垃圾再生骨料制备的水下抗分散混凝土不仅具有优异的水下抗分散能力,还充分利用了建筑垃圾再生骨料,实现了固废资源的有效利用,具有很强的现实意义。(The invention relates to underwater anti-dispersion concrete prepared from construction waste recycled aggregate, which comprises conventional stones, construction waste recycled coarse aggregate, construction waste recycled fine aggregate, extra fine sand, cement, mineral admixture, mineral filler, water reducer and anti-dispersing agent; wherein the mass ratio of the materials in unit volume is as follows: 6-8 parts of conventional stones, 1.5-2.5 parts of construction waste recycled coarse aggregate, 4-5 parts of construction waste recycled fine aggregate, 3-4 parts of extra fine sand, 2-4 parts of cement, 0.8-1.8 parts of mineral admixture, 0.1-1 part of mineral filler, 0.07-0.15 part of water reducing agent and 0.001-0.005 part of anti-dispersant. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate has excellent underwater anti-dispersion capacity, fully utilizes the construction waste recycled aggregate, realizes effective utilization of solid waste resources, and has strong practical significance.)

1. An underwater anti-dispersion concrete prepared from construction waste recycled aggregate is characterized in that: comprises conventional stones, construction waste recycled coarse aggregate, construction waste recycled fine aggregate, extra fine sand, cement, mineral admixture, mineral filler, water reducing agent and anti-dispersant; wherein the mass proportions of the conventional stones, the construction waste recycled coarse aggregate, the construction waste recycled fine aggregate, the extra-fine sand, the cement, the mineral admixture, the mineral filler, the water reducing agent and the anti-dispersing agent in unit volume are as follows: 6-8 parts of conventional stones, 1.5-2.5 parts of construction waste recycled coarse aggregate, 4-5 parts of construction waste recycled fine aggregate, 3-4 parts of extra fine sand, 2-4 parts of cement, 0.8-1.8 parts of mineral admixture, 0.1-1 part of mineral filler, 0.07-0.15 part of water reducing agent and 0.001-0.005 part of anti-dispersant.

2. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the particle size of the conventional stone is 10-20 mm.

3. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the particle size of the construction waste recycled coarse aggregate is 5-10 mm.

4. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the particle size of the construction waste recycled fine aggregate is 0-5mm, and the mud content is less than 0.5%.

5. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the superfine sand is yellow river surface sand, the particle size is 0-0.6mm, and the mud content is less than 0.5%.

6. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the mineral admixture can be one or two of fly ash and mineral powder.

7. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the mineral filler may be one or both of kaolin and bentonite.

8. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the water reducing agent can be a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.

9. The underwater anti-dispersion concrete prepared from the construction waste recycled aggregate according to claim 1, which is characterized in that: the anti-dispersant may be polyacrylamides or cellulose ethers.

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to underwater anti-dispersion concrete prepared from building waste recycled aggregate.

Background

When the concrete is poured underwater, the concrete can be subjected to the actions of pure water soaking, dynamic water impact and the like, so that the phenomena of separation of slurry and aggregate and the like easily occur, and the hardening strength of the underwater concrete is seriously influenced. With the increasing amount of underground or underwater works, underwater anti-dispersion concrete becomes a very important concrete category, and the amount is gradually increased.

The aggregates currently used for producing concrete are mainly conventional aggregates, i.e. aggregates formed after stone crushing. With the gradual aggravation of the environment-friendly situation and the gradual increase of the resource consumption, the conventional aggregate is less and less, and the aggregate shortage appears in many places once, so that the significance of searching for the substitute material of the conventional aggregate is great.

The building waste recycled aggregate is formed by crushing waste concrete, waste red bricks and the like which are remained after the house is dismantled. With the gradual advance of city construction, the quantity of construction waste of each city is increased in a burst mode, and the construction waste of a plurality of places is piled everywhere, so that the problem of influencing the city development is solved. At present, the construction waste is generally crushed into recycled aggregate, and compared with the conventional aggregate, the recycled aggregate of the construction waste has the characteristics of high water absorption, low strength and the like, most of the recycled aggregate of the construction waste is used for making bricks, building roads and the like, the added value is low, and a new high-added-value utilization way needs to be found.

Disclosure of Invention

The invention aims to provide the underwater anti-dispersion concrete prepared from the construction waste recycled aggregate, which takes the construction waste as the aggregate, can realize the application of the construction waste in the concrete under the condition of better underwater anti-dispersion property, and has strong environmental significance and economic benefit.

In order to achieve the purpose, the invention adopts the following technical scheme:

the underwater anti-dispersion concrete prepared from the building waste recycled aggregate is prepared from conventional stones, building waste recycled coarse aggregate, building waste recycled fine aggregate, extra fine sand, cement, mineral admixture, mineral filler, water reducer and anti-dispersing agent; wherein the mass proportions of the conventional stones, the construction waste recycled coarse aggregate, the construction waste recycled fine aggregate, the extra-fine sand, the cement, the mineral admixture, the mineral filler, the water reducing agent and the anti-dispersing agent in unit volume are as follows: 6-8 parts of conventional stones, 1.5-2.5 parts of construction waste recycled coarse aggregate, 4-5 parts of construction waste recycled fine aggregate, 3-4 parts of extra fine sand, 2-4 parts of cement, 0.8-1.8 parts of mineral admixture, 0.1-1 part of mineral filler, 0.07-0.15 part of water reducing agent and 0.001-0.005 part of anti-dispersant.

Preferably, the conventional pebble has a particle size of 10 to 20 mm.

Preferably, the particle size of the construction waste recycled coarse aggregate is 5-10 mm.

Preferably, the recycled fine aggregate of the construction waste has a particle size of 0-5mm, and the mud content is less than 0.5%.

Preferably, the superfine sand is yellow river surface sand, the particle size is 0-0.6mm, and the mud content is less than 0.5%.

Preferably, the mineral admixture can be one or two of fly ash and mineral powder.

Preferably, the mineral filler may be one or both of kaolin and bentonite.

Preferably, the water reducing agent can be a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.

Preferably, the anti-dispersant may be polyacrylamide or cellulose ether.

Advantageous effects

Compared with the prior art, the construction waste is used as the aggregate to prepare the underwater anti-dispersion concrete, so that the application of the construction waste in the underwater anti-dispersion concrete is fully realized, the application range of the construction waste recycled aggregate is expanded, an effective application way is provided for the treatment of the urban construction waste, and the method has good environmental benefit, economic benefit and social benefit.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the following examples, but the scope of the present invention is not limited thereto.