A kind of imitation stone environmental protection concrete pavement brick and its manufacturing method

Abstract

The invention relates to an imitated stone environment-friendly concrete road brick which comprises a surface layer and a base layer. The surface layer comprises, by weight, 5-30% of cement, 70-95% of at least one of quartz sand, granite broken sand and tailing sand and 5-30% of one of ethylene vinyl acetate, acrylic resin and waterborne epoxy resin, and the base layer comprises 3-10% of cement, 0-20% of mineral powder, 0-10% of coal ash, 10-50% of coal ash slag, 10-40% of iron ore dressing bits of 1.0-3.0% in fineness modulus and 35-50% of iron ore dressing bits of 2-10mm in grain diameter. The invention further relates to a making method of the road brick. The making method includes that an original producing, stirring and feeding sequence is adjusted, a binder is completely used to replace water for the surface layer, and a stirring process is improved specially. After a new material is used, feasibility of production links like stirring, material distributing, mould press-forming and demoulding is realized by technical means like changing feeding sequence and increasing stirring time. Compared with conventional surface layer mortar, the new surface layer is higher in flexibility and better in waterproofness, alkali efflorescence of cement products is inhibited, sand is protruding in texture, and the road brick has imitated stone effect integrally.

Description

Technical field [0001] The invention belongs to the technical field of pavement brick manufacturing, and particularly relates to a stone-like environment-friendly concrete pavement brick and a manufacturing method thereof. Background technique [0002] At present, cement is a traditional, cheap and reliable civil engineering material with a very large amount. There is no other material that can replace it for a long period of time. Therefore, cement is also a material with great vitality, but its related environmental resource issues have also received increasing attention from the state and society. [0003] The cement production process consumes a lot of resources and energy, causing serious environmental pollution. For example, cement production consumes a lot of limestone and clay resources. In our country, 1.4t~1.5t limestone, 0.2~0.3t clay and 0.2t coal are used per ton of cement clinker. At the same time, the production emits a large amount of carbon dioxide, nitrogen diox...

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Problems solved by technology

[0004] Portland cement, fly ash, sand, and gravel are commonly used in the proportion of concrete used in the production of pavement bricks. The surface layer is mortar, and the back layer is easy to fall off, fade and have poor weather resistance, and there are many customer complaints. , the durability is poor, and because it is a traditional process without technical barriers, the threshold is low

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