Alkali activated slag cement concrete prefabricated inspection well lid and preparation process thereof

Abstract

The invention discloses an alkali activated slag cement concrete prefabricated inspection well lid and a preparation process thereof. The inspection well lid is prepared from granulated blast-furnace slags, cement clinkers, retarders, sand, stone, steel fiber, water and sodium silicate. The preparation process comprises the following steps: in parts by weight, premixing granulated blast-furnace slags, cement clinkers, retarders, sand and stone in a mixer for 2-3 minutes; then, adding steel fiber by using a vibrating screen, and mixing the obtained mixture; adding water and sodium silicate by using a funnel; after mixing the obtained product, pouring the obtained product into an iron well-lid mould; after carrying out standing for 2-3 hours at room temperature, placing the obtained product into a steam curing chamber at a temperature of 75-85 DEG C to carry out curing for 2-3 days; and after carrying out natural cooling demoulding, carrying out watering and film covering on the obtained product to cure 7 for days. According to the invention, by using the excellent mechanical properties and durability properties of alkali activated slags, the impact-resistant and bending-resistant properties of the well lid are enhanced through mixing steel fibers with different lengths, and an alkali activated slag composite prefabricated round plate which is low in cost, light in weight and high in performance is prepared for replacing an iron inspection well lid, thereby solving the problem that an urban inspection well lid is stolen.

Description

technical field [0001] The invention relates to the field of inspection shaft covers, in particular to a prefabricated inspection shaft cover made of alkali slag concrete and a preparation process thereof. Background technique [0002] The streets and alleys of urban buildings are full of iron manhole covers, which are complicated to manufacture, high in cost, and cumbersome to maintain after application. Due to the recycling value of the materials, and often being coveted by criminals and missing, a series of traffic and civil accidents are caused. In order to solve this problem, some people try to use reinforced concrete to make the manhole cover, but its compressive strength is small, brittle, and heavy, which is not conducive to installation and maintenance; epoxy resin and unsaturated polyester are used as the matrix, fiber is added, and steel bars are used. Although the method of building a skeleton can meet the requirements of manhole covers, it is expensive and diffi...

AI Technical Summary

Problems solved by technology

[0002] The iron manhole covers in the streets and alleys of urban buildings are densely covered with Xinluo, which is complicated to manufacture, high in cost, and cumbersome to maintain after application. Because the materials have recycling value, and often appear to be coveted and stolen by lawless elements, a series of traffic and civil accidents are caused.

In order to solve this problem, some people try to use reinforced concrete to make the manhole cover, but its compressive strength is small, brittle, and heavy, which is not conducive to installation and maintenance; epoxy resin and unsaturated polyester are used as the matrix, fiber is added, and steel bars are used. Although the method of building a skeleton can meet the requirements of the manhole cover, it is expensive and difficult to be accepted by municipal engineering, and the aging resistance of the entire component will also be reduced after adding organic materials.