ASTM C125 is a standard set by the American Society for Testing and Materials (ASTM) that provides definitions for hydraulic cement concrete. It outlines the terminology used in the industry and ensures that there is a common language among professionals in the field. This standard is important for ensuring consistency and accuracy in the testing, specification, and use of hydraulic cement concrete.
ASTM C125 is for Standard Terminology Relating to Concrete and Concrete Aggregates. Download also ASTM C125 PDF.
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In this article or document, here define different terms of Concrete and Concrete Aggregates.
Define Absorption?
Absorption refers to the process of a liquid being drawn into and filling the permeable pores of a porous solid body. It is also the increase in mass of the porous solid body caused by the penetration of a liquid into its permeable pores. This term is commonly used in relation to hydraulic cement concrete, as it is essential to understand the extent of absorption that occurs within the concrete structure to ensure its durability and strength. The ASTM C125 provides further definitions related to hydraulic cement concrete.
What is admixture in concrete?
An admixture is a substance that is added to concrete to change its properties when it is mixed. There are different types of admixtures, including accelerating admixtures which help concrete set faster, air-entraining admixtures which create small air bubbles in the concrete, and chemical admixtures which come in liquid or solid form. Mineral admixture is an old term that is not used anymore.
What is meant by Air Content?
Air content refers to the volume of air voids present in cement paste, mortar, or concrete, excluding the pore space in the aggregate particles. It is typically expressed as a percentage of the total volume of the paste, mortar, or concrete.
D-cracking is a term used to describe a series of cracks that appear in concrete structures, usually near joints, edges, and structural cracks. The cracks are roughly parallel to these features and can cause significant damage to the concrete over time.
What is Pozzolan?
A pozzolan is a material containing silica and/or alumina that has little to no inherent cementitious properties but can react with calcium hydroxide in the presence of moisture at ordinary temperatures, forming compounds with cementitious properties.
What is meaning of Segregation?
Segregation in concrete refers to the unintentional separation of the constituents or particles of an aggregate, which leads to a lack of uniformity in their distribution. It occurs when the heavier materials in the mix settle faster than the lighter materials, causing the mix to become non-uniform. Segregation can result in a reduction in the quality and strength of the concrete, as well as an increase in its permeability and the potential for cracking. It is important to take measures to prevent segregation during the mixing, placing, and finishing of concrete.
What is definition of Shotcrete?
Shotcrete is a type of mortar or concrete that is sprayed at high velocity onto a surface. There are two types of shotcrete: dry-mixture shotcrete, where most of the mixing water is added at the nozzle, and wet-mix shotcrete, where most of the ingredients including water are mixed prior to introduction into the delivery hose.
What is water-cement ratio?
The water-cement ratio refers to the ratio between the mass of water, excluding that absorbed by the aggregates, and the mass of Portland cement in concrete, mortar, or grout. It is expressed as a decimal and is used to determine the workability and strength of the mixture.
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