Flexural Strength of Concrete

Flexural Strength of Concrete

Flexural Strength Flexural strength is an indirect measure of the tensile strength of concrete. It is a measure of the maximum stress on the tension face of an unreinforced concrete beam or slab at the point of failure in bending. It is measured by loading 150 x 150-mm (or (100 x 100-mm) concrete beams with a span length …

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Reasons of Concrete Spalling

Reasons of Concrete Spalling

Concrete Spalling Currently, there are two mechanisms concerning the occurrence of spalling: 1- the pore pressure build up causes spalling in the cement matrix and 2- thermal and mechanical stresses. In 1997, Anderberg gave an account on spalling caused by vapour pressure. The mechanism is believed to be the same for both High Performance Concrete (HPC) …

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Causes of Formwork Failures

Causes of Formwork Failures

 Causes of Formwork Failures Failure of formwork in general results from various causes: excessive loads, premature removal of forms or shores, inadequacies related to formwork, and human error on the job, whether due to indifference, haste, or lack of knowledge. Hadipnono and Wang (1986) studied the causes of 85 major falsework failures that have been documented …

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Concrete Repair and Maintenance System

Concrete Repair and Maintenance System

Concrete repairs have occurred on Reclamation projects since the first concrete was placed in 1903. Unfortunately, even though the best available knowledge and materials were used, many repair failures have occurred during the 112 years since that first concrete was placed. As a first step to increase the likelihood of a successful repair, it is …

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