i. How and why do we test compressive strength?ii. What does it tell us about the mixiii. What is expected to happen over time as we are testing

Compressive strength is a very important property of materials and structures. It measures the ability of a material or structure to resist being crushed or squeezed by a force. Compressive strength is often used to design and evaluate buildings, bridges, dams, and other structures that need to withstand heavy loads.Compressive strength is a key value for engineering and design. It helps to ensure the safety and durability of structures and materials that are subjected to compressive loads. Compressive strength also indicates the performance and quality of a material or structure, and whether it meets the specifications and standards for its intended use.We test the compressive strength of concrete to determine its ability to resist the loads and forces that it may encounter in service. Compressive strength is the most important property of concrete, as it affects the structural integrity and durability of concrete elements.We test the compressive strength of concrete by preparing standard specimens (cubes or cylinders) from the same concrete mix used in the field, and applying a gradually increasing load on them until they fail. The load at failure divided by the cross-sectional area of the specimen gives the compressive strength of concrete.The compressive strength of concrete tells us about the quality and performance of the concrete mix. It reflects the proportion and quality of the ingredients (cement, water, aggregates, and admixtures), the curing conditions, and the quality control during the production of concrete. A higher compressive strength indicates a better concrete mix that can withstand higher loads and pressures, and resist cracking and deterioration. A lower compressive strength may indicate a poor concrete mix that may have problems such as segregation, bleeding, honeycombing, or excessive water content.The compressive strength of concrete is expected to increase over time as we are testing, as the hydration process of cement continues and the concrete gains strength. The rate and extent of strength gain depend on factors such as the type and amount of cement, the water-cement ratio, the curing temperature and humidity, and the presence of admixtures. Generally, the compressive strength of concrete is tested at 7 days and 28 days, as these are the standard ages for evaluating the strength development of concrete. However, some concrete mixes may achieve their design strength earlier or later than these ages, depending on the factors mentioned above.The compressive strength of concrete is a measure of its ability to resist the loads and forces that it may face in service. It is tested by applying a gradually increasing load on standard specimens of concrete until they fail. The compressive strength depends on the quality and proportion of the ingredients, the curing conditions, and the quality control of the concrete production. The compressive strength increases over time as the cement hydrates and the concrete hardens.

Answered: i. How and why do we test ii. What does…

Engineering

Civil Engineering

i. How and why do we test ii. What does it tell us about the mix iii. What is expected to happen over time as we are testing compressive strength?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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