Method for preparing regenerative road material by using waste concrete and construction method thereof

A technology of waste concrete and construction method, applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as the inability to guarantee construction quality and road service life, save natural sand and gravel materials, ensure the use of effect of effect

Inactive Publication Date: 2008-09-03
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

Because the physical properties of waste concrete and natural building materials are quite different, such as the water absorption rate of waste concrete is relatively larg...

Method used

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  • Method for preparing regenerative road material by using waste concrete and construction method thereof
  • Method for preparing regenerative road material by using waste concrete and construction method thereof

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Embodiment Construction

[0028] Recycled road construction material prepared from waste concrete used as subbase material for municipal roads and construction access roads and its preparation method and construction method

[0029] 1. Sorting waste concrete, removing metal, wood and impurities, and removing waste concrete contaminated by radioactive, heavy metal and other harmful impurities;

[0030] 2. The crushing of waste concrete in the project adopts the principle of centralized crushing, and the waste concrete is crushed and screened to obtain waste concrete particles with a maximum particle size of less than 32mm;

[0031] 3. Prepare materials,

[0032] (1) Prepare waste concrete pellets according to the design requirements, the maximum particle size is less than 32mm, and should not be greater than one-third of the construction layer thickness;

[0033] (2) 32.5, 42.5, 52.5, 62.5 grade ordinary Portland cement, slag Portland cement and pozzolanic Portland cement with initial setting time ≥ 3 ...

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Abstract

A regeneration road material produced with waste concrete is used as a subbase material of roads and construction service roads and comprises waste concrete particles, cement, admixture, water reducer, expansion agent and water. The preparation method includes: separating; removing impurities, removing waste concrete contaminated by radioactive materials, heavy metals and other harmful impurities; crashing and screening; adding admixtures, water reducer, expansion agents, cement and water for mixing into a cement stable waste cement regeneration road material. The construction method of the regeneration road material produced with waste concrete includes: preparing feed according to the designed particle size and evenly mixing the cement and regeneration materials after adding water and paving in equilibrium continuously and uninterruptedly; rolling by using rollers to roll and shape the paving surface and compacting to the design required compaction degree; sprinkling for curing and sweeping away the soil sundries from the subbase surface and spraying prime coat asphalt with asphalt spray car. The invention makes full use of waste concrete to produce road materials, thereby expanding the sources of construction materials and solving the problem of recycling of waste concrete, so that the environment pollution is reduced and the natural construction resources are fully utilized.

Description

technical field [0001] The invention relates to a road construction material and a construction method thereof, in particular to a recycled road construction material prepared from waste concrete, a preparation method and a construction method thereof. Background technique [0002] Waste concrete refers to the waste waste concrete produced during the construction, repair and demolition of buildings. With the development of my country's modernization and the acceleration of urbanization, large-scale new city construction and old city renovation have led to an increasing number of construction waste. Waste concrete is the main component of urban waste, accounting for about 30-40% of the total urban waste. Most of the waste concrete is directly stacked or landfilled without treatment, which not only takes up a lot of land, pollutes the environment, but also causes a lot of waste of resources. Since our country has been carrying out large-scale construction in recent years, a l...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16C04B14/04
CPCC04B2111/0075C04B41/009C04B41/478C04B28/02Y02W30/91C04B18/16C04B20/0076C04B20/02C04B40/0259C04B40/0277C04B2103/302C04B41/4523
Inventor 李如燕孙可伟赵焱李跃炬林志伟王守刚
Owner KUNMING UNIV OF SCI & TECH
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