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Diatomite-cement slurry-wrapped aggregate for concrete and preparing method and application thereof

A technology of diatomite and concrete, which is applied in the field of recycled aggregate concrete, can solve the problems of low strength, high porosity, and high water absorption of recycled aggregate, and achieve the effects of low cost, improved water absorption, and improved processing industrialization

Active Publication Date: 2019-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of high water absorption, high porosity and low strength of recycled aggregate, the present invention provides a diatomite cement-coated aggregate for concrete, which is made of the following raw materials in parts by weight: 3 parts of recycled aggregate , 1-2 parts of diatomite, 4 parts of cement and 3-3.5 parts of water

Method used

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  • Diatomite-cement slurry-wrapped aggregate for concrete and preparing method and application thereof
  • Diatomite-cement slurry-wrapped aggregate for concrete and preparing method and application thereof
  • Diatomite-cement slurry-wrapped aggregate for concrete and preparing method and application thereof

Examples

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Embodiment 1

[0034] Example 1: Preparation method of diatomite cement paste aggregate for concrete.

[0035] The diatomite cement-coated aggregate described in this embodiment is made of the following raw materials in parts by weight: 3 parts of recycled aggregate, 1 part of diatomite, 4 parts of cement and 3 parts of water.

[0036] The preparation method is realized according to the following steps:

[0037] Step 1: Crushing: Put the obtained construction waste into a jaw crusher for crushing to obtain particles with relatively small particle sizes.

[0038] Step 2: Screening: Put the granules obtained in Step 1 into a sieving machine to obtain recycled aggregate with a reasonable particle size and a good grade, with a particle size of 4.75-30mm.

[0039] Step 3: Diatomite calcination treatment: place the diatomite in a muffle furnace for calcination at a high temperature of 850° C. for 2 hours to prepare siliceous diatomite.

[0040] Step 4: Grinding treatment: put the calcined diatom...

Embodiment 2

[0043] Example 2. Preparation method of diatomite cement-coated aggregate for concrete.

[0044] Repeat Example 1, the difference from Example 1 is that the recycled aggregate described in this example is made of the following raw materials in parts by weight: 3 parts of recycled aggregate, 2 parts of diatomite, 4 parts of cement and 3 parts of water . Its preparation method is described with reference to embodiment 1.

Embodiment 3

[0045] Example 3. Preparation of diatomaceous earth cement-coated aggregate for concrete.

[0046] Repeating Example 1, the recycled aggregate described in this example is made of the following raw materials in parts by weight: 3 parts of recycled aggregate, 2 parts of diatomaceous earth, 4 parts of cement and 3.5 parts of water. The preparation method is as described in Example 1, except that the high-temperature calcination temperature in Step 3 is 750° C., and the calcination time is 2.5 hours.

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Abstract

The invention discloses a diatomite-cement slurry-wrapped aggregate for concrete and a preparing method and application thereof, and belongs to the technical field of recycled aggregate concrete in building materials. For solving the problem that a recycled aggregate is large in water absorbability, high in porosity, low in intensity and the like, diatomite is calcined to be prepared into diatomite powder, the diatomite powder, cement and water are mixed by weight to be prepared into cement-wrapped slurry, the recycled aggregate is wrapped with the cement-wrapped slurry, and the obtained recycled aggregate is maintained to be prepared to obtain the diatomite-cement slurry-wrapped aggregate. The diatomite-cement slurry-wrapped aggregate can be used for preparing recycled concrete.

Description

technical field [0001] The invention belongs to the technical field of recycled aggregate concrete in building materials, and in particular relates to a diatomite cement slurry-coated aggregate for concrete, a preparation method and application thereof. Background technique [0002] Recycled aggregate is the construction waste produced by the loss of natural aggregate and the demolition of concrete whose service life has expired. The waste concrete produced in my country is about 160 million tons every year, and it is increasing at an average annual rate of 8%. Construction waste has continuously encroached on the cultivated land, and has long been disposed of by landfill or stacking, which undoubtedly exacerbates the tension in land resources. At the same time, the dust generated during demolition pollutes the environment. The severe construction industry situation makes the research on recycled aggregate concrete Development is imminent. However, recycled aggregate concre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B18/02
CPCC04B18/023C04B20/1077C04B18/167C04B20/1055C04B14/08
Inventor 严佳川陈鹏王毓萱杨振丽张曦蓓孟祥浩
Owner HARBIN INST OF TECH