On one graph, draw a sketch showing the typical relationship between the stress and strain of concrete specimens with high and low water–cement ratios. Label all axes and curves. Comment on the effect of increasing the water–cement ratio on the stress–strain response.

On one graph, draw a sketch showing the typical relationship between the stress and strain of concrete specimens with high and low water–cement ratios. Label all axes and curves. Comment on the effect of increasing the water–cement ratio on the stress–strain response.

Construction Materials, Methods and Techniques (MindTap Course List)

4th Edition

ISBN:9781305086272

Author:William P. Spence, Eva Kultermann

Publisher:William P. Spence, Eva Kultermann

Chapter7: Concrete

Section: Chapter Questions

Problem 6RQ: How does the addition of air-entraining materials to Portland cement improve the concrete?

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Concept explainers

Types of Cement

Cement is a fine mixture of limestone, chalk, or marl and clay which when mixed with water, becomes compacted due to the formation of strong molecular bonds. Due to hydration, cement turns into a hard mass when left for a sufficient amount of time upon mixing with water. The water turns the cement compounds into gel-like submicroscopic particles having higher surface areas. It is due to the hydration properties of cement, they are often known as hydraulic cement. For instance, Portland cement is a popular example in this category.

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