The author discusses the factors that should be considered by flooring contractors when handling joints in a concrete slab. He considers the indicators to knowing whether a concrete joint is active or dorm...
Embodiments of the system may include: a first on-grade concrete-slab portion; a second on-grade concrete-slab portion that is separat... R Boxall,N Parkes - US 被引量: 3发表: 2009年 Load transfer across cracks and joints in concrete slabs on grade There is a growing demand for in-...
Although one of these joints made from a joint trowel doesn't extend completely through the thickness of the slab, there is enough space in the top part of the joint to absorb most of the expansion or contraction that will happen. But if your concrete slab is to be used as a driveway...
Expansion joints are more common on big commercial projects and often aren’t required when pouring residential slabs. These joints usually require filling, especially if the concrete is going to be polished or finished with a coating (see Sealing Joints in a Concrete Slab). ...
Again, isolation joints are placed purposefully to improve the structural integrity of the pour. Cold joints are a mistake. Cold joints are also a weakness in the concrete slab, since the concrete doesn’t have a chance to bond correctly. These joints should be rectified to ensure the strength...
Form joints accurately to detail and in locations shown on the drawings. If modifications to any joint design or location are necessary on site, agree revisions with the engineer before proceeding. Do not allow concrete to enter any gaps or voids in the formwork or to render the movement ...
Construction joints are predominant reducing tensile stress due to shrinkages of the concrete slab. These take the form of dummy and butt joints. In the dummy joint, a crack inducer is placed at the bottom surface to correspond with a groove cut in the top surface to provide a plane of ...
Filling a joint gap with a concrete slab joint sealant helps to support the joint and prevent arris damage, both for saw-cut joints and armoured joints.
Concrete foundation cold pour joints: This article describes the appearance, cause, & problems that may occur at cold pour joints in concrete foundation walls and occasionally floors or ceilings. A cold pour joint, where successive pours or placements of concrete abut during building construction, ar...
This paper reports on the development of a laboratory test method to assess the deterioration of concrete cracks and joints under low intensity, high cycle loading, typical of that found in industrial flooring, external hardstandings and rigid pavements. The half-scale prism specimen enables the imp...