Any admixture that improves the workability of concrete is advantageous for enhancing the pumpability of concrete. Various chemical admixtures like air-entraining admixture, high-range water-reducing admixture, and finely divided admixture have been utilized to improve concrete pumpability. The choice of the ...
Category: Concrete Admixtures
Admixtures are used to modify properties of concrete in fresh and hardened state. Articles on concrete admixtures are presented.
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How can Lignin Help Improve Concrete Construction?
Lignin is a wood waste, which after necessary processing, can be used in the field of building materials and construction as a water-reducing admixture, set retarder, grinding agent in cement production, cement replacement materials, etc. It makes concrete stronger by ...
How does Natural Pozzolan affect Concrete Properties? [PDF]
![How does Natural Pozzolan affect Concrete Properties? [PDF]](https://i0.wp.com/theconstructor.org/wp-content/uploads/2020/06/What-are-the-effects-of-natural-pozzolans-on-concrete-properties-629x420.jpg)
Natural pozzolans affect several concrete properties in both fresh and hardened state. It improves the workability of concrete and increases its setting time. The reduction of concrete bleeding and segregation is one of the crucial benefits of natural pozzolans. It ...
How to Mix, Compact, and Cure Lime Concrete? [PDF]
![How to Mix, Compact, and Cure Lime Concrete? [PDF]](https://i0.wp.com/theconstructor.org/wp-content/uploads/2020/05/How-to-Mix-Compact-and-Cure-Lime-Concrete-629x420.jpg)
Lime concrete is a composite mixture of lime as binding material, sand as fine aggregate, and gravel as coarse aggregate in appropriate proportions. Lime concrete mix ratio depends on the type of construction, but in general, it can be taken ...
How to Develop High-Early-Strength Concrete? [PDF]
![How to Develop High-Early-Strength Concrete? [PDF]](https://i0.wp.com/theconstructor.org/wp-content/uploads/2020/05/How-to-Achieve-High-Early-Strength-Concrete-629x420.jpg)
High-early-strength concrete can be developed using ordinary concrete constituents, special admixtures, and certain concreting practices. The high-early-strength concrete, which is also called fast track concrete, gains its specified strength at an early age compared to ordinary concrete. The time during ...
7 Uses of Natural Pozzolans in Concrete Applications [PDF]
![7 Uses of Natural Pozzolans in Concrete Applications [PDF]](https://i0.wp.com/theconstructor.org/wp-content/uploads/2020/04/7-uses-of-natural-pozzolans-in-concrete-applications-629x420.jpg)
Pozzolans can be blended with lime (or Portland cement) to produce blended cements that can replace pure Portland cement commonly used in building materials such as concrete, masonry block, masonry mortar, bricks, and other construction units. Utilization of natural pozzolans ...
Shrinkage Reducing Concrete Admixture: Mechanism, and Applications
Shrinkage-reducing concrete admixture promote expansion of the concrete at about the same volume that normal drying shrinkage is contracting it. The net change in length of the hardened concrete is small enough to prevent shrinkage cracks. Shrinkage reducing concrete mixture ...
Water-reducing Set-retarding Admixtures: Affects, and Applications
Water-reducing and set-retarding admixtures are chemicals that slow down the initial reaction between cement and water by reducing the rate of water penetration to the cement and slowing down the growth of the hydration products. As a result, concrete stays ...