Preparation method of recycled water-permeable concrete pavement brick or plate and application thereof

Abstract

The invention discloses a preparation method of a recycled water-permeable concrete pavement brick or plate. The preparation method comprises the following steps: S1, classifying, recycling and preparing a recycled raw material; S2, determining preparation strength and a water-binder ratio; S3, preparing recycled water-permeable concrete slurry; S4, determining a reference mix proportion; and S5,determining a production mix proportion. The invention further provides application of the preparation method of the recycled water-permeable concrete pavement brick or plate, which comprises the following steps: S1, determining the dosage of raw materials; S2, preparing rough recycled water-permeable concrete by a two-step stirring method; and S3, preparing a finished recycled water-permeable brick or plate. The method has the beneficial effects that the preparation strength, the dosage of water, a binder and raw materials, the density and the gas content of the recycled water-permeable concrete slurry, the reference mix proportion and the production mix proportion are determined by utilizing wastes, data is provided for the solubility of the wastes, and meanwhile, the preparation cost isreduced; and a two-time stirring method is utilized, so that recycled raw materials prepared from wastes can be fully compatible.

Description

technical field [0001] The invention relates to the field of green and environment-friendly building materials, in particular to a preparation method and application of recycled permeable concrete pavement bricks or boards. Background technique [0002] With the development of industry, commerce, construction and agriculture in our country, a huge amount of garbage or waste has been produced, seriously affecting the environment. In terms of agriculture, straw resources have not been effectively utilized for a long time, and are often used as livestock feed, returned to the field or incinerated. However, as livestock feed, livestock have a strong selectivity to straw, and rapeseed straw, for example, has high toughness and cannot be used as animal feed , and incineration will cause pollution to the environment, and it is difficult to dispose of. In terms of industry, commerce and construction, solid waste, especially construction waste, is piled up in various places, which no...

AI Technical Summary

Problems solved by technology

[0004] Therefore, in terms of comprehensive permeable floors and domestic waste recycling, recycled permeable concrete has emerged as the times require. Among them, recycled permeable concrete is made of recycled aggregates, recycled light materials, recycled powder and gelling materials, and is prepared by hydration process. Aggregate, compressive strength range of recycled permeable concrete C 10 ~C 30 , tested according to the provisions of GB / T50081-2019, and at the same time relax the relevant performance indicators of permeable concrete aggregate according to Article 4.1.2 of CJJ / T253-2016, the industry standard of the People's Republic of China (Technical Regulations for the Application of Recycled Aggregate Permeable Concrete), and according to (Regenerated Aggregate Application Technical Regulations) Article 3.0.2 of JGJ / T240-2011 is mainly aimed at the limitation of the use of recycled aggregates to prepare concrete, mortar and blocks or bricks. According to the requirements of CJJ / T253-2016, recycled aggregates are limited to concrete and stones, and the powder materials should be not lower than secondary fly ash, not lower than S95 grade slag and silica fume to prepare permeable concrete. Concrete, which leads to a large number of construction, agricultural and industrial wastes that cannot be recycled in large quantities. The main reason is that the types and properties of construction, agricultural and industrial wastes are complex, the recycled light materials produced by the recycling of agricultural wastes and the recycling of industrial wastes The compatibility between recycled powder and aggregate and cement and other materials is poor. The types and components of waste in different regions vary widely. The physical, chemical and mechanical properties of each waste are also different, and the compatibility of mixing them with each other is poor. , the reasonable determination of the amount of each raw material or the selection of the dosage is a big technical problem, especially the ratio between the recovered recycled aggregate and the sand and gravel aggregate is extremely unstable: a large number of micro-cracks are generated during the crushing process, resulting in large porosity and high water absorption. The crushing index is high, which leads to the obvious decline in the physical and mechanical properties of concrete or is extremely difficult to control; therefore, there is an urgent need for a method and application of recycled permeable concrete pavement bricks or slabs to solve the compatibility problem between various wastes and provide corresponding ratio of

Images