Concrete Admixtures – The Constructor https://theconstructor.org Sun, 05 Sep 2021 08:07:10 +0000 en-US hourly 1 https://i0.wp.com/theconstructor.org/wp-content/uploads/2021/04/cropped-The-Constructor-favicon-tinified2-1.png?fit=32%2C32&ssl=1 Concrete Admixtures – The Constructor https://theconstructor.org 32 32 181067336 How can Lignin Help Improve Concrete Construction? https://theconstructor.org/concrete/lignin-improve-concrete-construction/558107/ Sun, 05 Sep 2021 08:07:07 +0000 https://theconstructor.org/?p=558107 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 increasing its compressive strength, and greener by reducing cement quantity in concrete production. As a […]

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]]> 558107 How does Natural Pozzolan affect Concrete Properties? [PDF] https://theconstructor.org/concrete/affects-natural-pozzolan-concrete/44235/ Tue, 09 Jun 2020 07:43:15 +0000 https://theconstructor.org/?p=44235 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 enhances concrete durability, but reduces early strength and ultimate strength when the mix contains a […]

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]]> 44235 How to Mix, Compact, and Cure Lime Concrete? [PDF] https://theconstructor.org/practical-guide/mix-compact-cure-lime-concrete/43249/ Sun, 24 May 2020 18:23:48 +0000 https://theconstructor.org/?p=43249 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 up to a 1:2:3 ratio for lime, sand, and coarse aggregate, respectively. Lime concrete had […]

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]]> 43249 How to Develop High-Early-Strength Concrete? [PDF] https://theconstructor.org/concrete/achieve-high-early-strength-concrete/41909/ Sun, 24 May 2020 15:09:00 +0000 https://theconstructor.org/?p=41909 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 which the concrete should achieve the specified strength ranges from a few hours to several […]

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]]> 41909 7 Uses of Natural Pozzolans in Concrete Applications [PDF] https://theconstructor.org/building/uses-natural-pozzolans-concrete-applications/40046/ Wed, 29 Apr 2020 17:26:23 +0000 https://theconstructor.org/?p=40046 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 in civil projects include structural concrete, precast and prestressed elements, mass concrete, concrete pipes, concrete […]

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]]> 40046 Shrinkage Reducing Concrete Admixture: Mechanism, and Applications https://theconstructor.org/concrete/shrinkage-reducing-concrete-admixture/7242/ https://theconstructor.org/concrete/shrinkage-reducing-concrete-admixture/7242/?noamp=mobile#comments Sun, 22 Mar 2020 09:23:45 +0000 https://theconstructor.org/?p=7242 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 is typically comprised of polyoxyalkylene alkyl ether or similar composition. When such admixture is added […]

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]]> https://theconstructor.org/concrete/shrinkage-reducing-concrete-admixture/7242/feed/ 1 7242 Water-reducing Set-retarding Admixtures: Affects, and Applications https://theconstructor.org/concrete/water-reducing-retarding-concrete-admixture/7272/ https://theconstructor.org/concrete/water-reducing-retarding-concrete-admixture/7272/?noamp=mobile#comments Fri, 20 Mar 2020 23:15:43 +0000 https://theconstructor.org/?p=7272 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 workable longer than it would otherwise. The length of time during which a concrete remains […]

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]]> https://theconstructor.org/concrete/water-reducing-retarding-concrete-admixture/7272/feed/ 2 7272 Corrosion Inhibiting Admixtures: Types, Dosages, and Applications https://theconstructor.org/concrete/corrosion-inhibiting-admixtures/6765/ Mon, 16 Mar 2020 14:09:00 +0000 https://theconstructor.org/?p=6765 Corrosion inhibitors are admixtures that either extend the time to corrosion initiation or significantly reduce the corrosion rate of embedded metal, or both, in concrete containing chlorides in excess of the accepted corrosion threshold value for the metal in untreated concrete, as per ACI 222R. There are four common type of corrosion inhibiting admixtures, and […]

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