Topic Tag: Unit 8

Joint in Concrete

A number of factors must be considered when planning where to place joints in a slab, such as the size of the slab, the location of rigid objects, and the slab thickness. You must also decide if the joints will be made as the concrete is placed or cut after the concrete has cured. In …

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Super Flat Floors

Although flat floors have always been the goal of cement masons, concrete slabs have never been truly flat. For many years this was not a problem because small variations in floor surface were seldom noticed. However, with the advent of VNA (Very Narrow Aisle) technology in warehouses this began to change. VNA technology was an …

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Concrete Ingredients

Concrete results from a careful mixture of portland cement paste and aggregates such as sand, gravel, crushed stone, and other materials. A chemical reaction called hydration causes the mixture to harden into the rock-like mass we know as concrete. When it is first mixed, concrete is soft and malleable, but when it hardens it is …

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