Method for preparing hybrid fiber modified light water-permeable and durable recycled concrete
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A technology of recycled concrete and hybrid fibers, applied in the field of concrete, can solve the problems of ecological environment and natural resource threats, improper disposal of construction waste, harm to the natural environment, etc., to enhance ductility and energy consumption performance, and increase elastic modulus , Improve the effect of impermeability
Inactive Publication Date: 2018-12-28
枞阳县天筑新型建筑材料有限公司
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Problems solved by technology
[0002] Since the 21st century, my country has vigorously developed the construction industry, which has produced a huge amount of construction waste. Due to the inappropriate treatment of construction waste, it has greatly endangered the natural environment we rely on for survival; on the other hand, the production of building materials requires a large amount of natural resources. resources, posing a major threat to the ecological environment and natural resources
However, in practical engineering applications, in addition...
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Embodiment 1
[0029] A method for preparing lightweight permeable and durable recycled concrete modified with hybrid fibers, characterized in that it comprises the following steps:
[0031] The waste concrete is crushed and sieved to obtain recycled concrete coarse aggregate with a particle size of 5-40mm, which is put into a vacuum container, kept under 0.1MPa vacuum pressure for 5 hours, injected with polyvinyl alcohol solution, soaked and modified After 23h, take it out and dry it at room temperature;
[0032] (2) Prepare foam:
[0033] Pour 2 parts of foaming agent into water and mix, stir evenly to obtain foaming liquid, pour the foaming liquid into the liquid tank of the foaming machine for foaming;
[0034] (3) Preparation of slurry:
[0035] First mix 25 parts of mineral aggregate, 30 parts of cementitious material, 60 parts of fine aggregate, and 70 parts of modified recycled coarse aggregate obtained in (1), and then pou...
Embodiment 2
[0042] A method for preparing lightweight permeable and durable recycled concrete modified with hybrid fibers, characterized in that it comprises the following steps:
[0044] The waste concrete is crushed and sieved to obtain recycled concrete coarse aggregate with a particle size of 5-40mm, which is put into a vacuum container, kept under 0.1MPa vacuum pressure for 6 hours, injected with polyvinyl alcohol solution, soaked and modified After 25h, take it out and dry it at room temperature;
[0045] (2) Prepare foam:
[0046] Pour 4 parts of foaming agent into water and mix, stir evenly to obtain foaming liquid, pour the foaming liquid into the liquid tank of the foaming machine for foaming;
[0047] (3) Preparation of slurry:
[0048] First mix 35 parts of mineral aggregate, 45 parts of cementitious material, 70 parts of fine aggregate, and 80 parts of modified recycled coarse aggregate obtained in (1), then pour wa...
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Abstract
The invention discloses a method for preparing hybrid fiber modified light water-permeable and durable recycled concrete. First a mineral miscellaneous material, a cementing material and a modified regenerated coarse aggregate are evenly mixed, water is poured for stirring to obtain cement paste, a ternary hybrid fiber and water are evenly mixed and then poured into the cement paste for stirring,and an efficient naphthalene water reducer is added; after uniform mixing, foams well made by a foaming device are added, and full and uniform mixing is performed to obtain concrete slurry; the well prepared concrete slurry is poured into a die and lightly and evenly vibrated, the surface of a poured sample is covered with a preservative film, demolding is performed after standing, and curing is performed. A glass fiber, a polypropylene fiber and a steel fiber are mixed into the ternary hybrid fiber, the recycled concrete is modified, the compressive strength can be obviously improved, the steel fiber in the hybrid fiber belongs to high elastic modulus fibers, so that the elasticity modulus of the recycled concrete after the doping of the hybrid fiber is increased, and the doping of the hybrid fiber can obviously improve the vibration resistance of the recycled concrete and enhance ductility and energy dissipation performance of the recycled concrete.
Description
technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a preparation method of lightweight, permeable and durable recycled concrete modified by hybrid fibers. Background technique [0002] Since the 21st century, my country has vigorously developed the construction industry, which has produced a huge amount of construction waste. Due to the inappropriate treatment of construction waste, it has greatly endangered the natural environment we rely on for survival; on the other hand, the production of building materials requires a large amount of natural resources. resources, posing a major threat to the ecological environment and natural resources. Recycling, processing and reusing construction waste can not only solve the damage of construction waste to the natural environment, but also alleviate the threat to the ecology caused by sand and gravel mining. Therefore, the effective and reasonable utilization of waste concrete ...
Claims
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Application Information
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