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A technology for cement concrete and waste concrete, applied in the field of concrete, can solve the problems of not being able to effectively reduce sand with high mud content, unable to meet various demands, and single performance of admixtures, etc., so as to achieve the effect of reducing cost.
Inactive Publication Date: 2019-01-15
淮安市冰青建设工程管理有限公司
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Problems solved by technology
At present, the existing concrete admixtures can reduce mixing water, increase workability, control setting time, early strength, reinforcement, durability, dyeing, air-entrainment, etc., but the admixtures generally have single performance and cannot meet various needs. , and there is no admixture that can effectively reduce the impact of high mud content sand on the performance of concrete
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Embodiment 1
[0019] Take 35 parts of waste concrete and 16 parts of ceramic waste, crush and grind them into powder less than 30mm, for later use; soak the ground powder in water, then take it out for drying; calcinate the dried ground powder at 900℃ for 2 hours, After cooling, grind, screen, waste calcined material; mix waste calcined material with a particle size of 5mm with 30 parts of cement, 35 parts of crushed stone, 3 parts of additives, water and 30 parts of light filler Evenly, concrete is obtained by casting, compacting, and curing. Wherein, the light filler is a mixture of light calcium carbonate and diatomaceous earth, and the weight ratio of the light calcium carbonate to diatomaceous earth is 4:1.
Embodiment 2
[0021] Take 40 parts of waste concrete and 14 parts of ceramic waste, crush and grind them into powder less than 30mm, for later use; soak the powder in water, then take it out for drying; calcinate the dried powder at 1100°C for 1 hour, After cooling, grind, screen, waste calcined material; mix waste calcined material with a particle size of 10mm with 35 parts of cement, 30 parts of crushed stone, 5 parts of admixtures, water and 10 parts of light fillers Evenly, concrete is obtained by casting, compacting, and curing. Wherein, the light filler is a mixture of light calcium carbonate and diatomaceous earth, and the weight ratio of the light calcium carbonate to diatomaceous earth is 6:1.
[0022] The additives described in Examples 1 and 2, based on parts by mass, are polycarboxylic acid water reducing agent 40-50 parts, cellulose grafted chitosan 15-20 parts, flue deposit 15-20 parts, 5-10 parts of silane coupling agent, 1-5 parts of polyvinylpyrrolidone, 1-5 parts of silicon ...
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Abstract
The invention belongs to the technical field of concrete and specifically relates to a preparation method of cement concrete. the preparation method comprises the following steps: fetching waste concrete and ceramic waste, crushing, and grinding into a powder with the particle size being less than 30 mm for later use; immersing the powder into water, taking out and drying; calcining the dried powder at 900-1100 DEG C, cooling, grinding, screening to obtain a waste calcined material; uniformly mixing the waste calcined material with cement, crushed stone, an admixture, water and a lightweight filler, pouring, carrying out vibration compaction, and maintaining to obtain the concrete. During the preparation process of the concrete, part of building waste concrete is added to respectively replace part of sand and crushed stone after processed, thus changing waste into valuable things and lowering the cost. The invention provides a preparation method of concrete with high mud content. Sandwith high mud content can be used as a raw material of the concrete; and with the introduction of the admixture, the concrete with high mud content still can meet building requirements.
Description
Technical field [0001] The invention belongs to the technical field of concrete, and specifically relates to a method for preparing cement concrete. Background technique [0002] Concrete is the most widely used building material in modern times. It has the advantages of abundant raw materials, low price, simple process, high strength and good durability. Ready-mixed concrete is a type of concrete. It is composed of cement, aggregates, water, admixtures, mineral admixtures and other components mixed according to needs in a certain proportion in a mixing station after being measured and mixed, and sold. The concrete mixture that is transported to the place of use by a transport vehicle within the specified time. Because on-site construction has a greater impact on the environment, ready-mixed concrete has received more and more attention. However, after the concrete materials are mixed, chemical reactions will occur over time, which will adversely affect the fluidity, slump loss...
Claims
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Application Information
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