what are accelerators and retarders in concrete?-quora

  • what are accelerators and retarders in concrete? - quora

    What are accelerators and retarders in concrete? - Quora

    Chemical admixtures are the ingredients in concrete other than portland cement, water, and aggregate that are added to the mix immediately before or during mixing.

  • which admixture increase the strength of concrete? - quora

    Which admixture increase the strength of concrete? - Quora

    Thanks for A2A.. Admixtures are nothing but Ingredients used for concrete other than, Cement,Water,Aggregates and added before or during mixing. Generally admixtures divided in to 2 parts, 1.

  • name of admixtures for concrete

    name of admixtures for concrete

    The chemical admixtures such as water reducers, accelerators, air-entraining agents, and retarders are being used worldwide from the last 5-6 decad The most commonly used chemical admixtures in concrete even in normal strength concrete in our country are water reducers and/or superplasticizers, accelerators, and retarders.

  • what are the roles of each ingredient in concrete? - quora

    What are the roles of each ingredient in concrete? - Quora

    1. Cement binds the aggregate into a solid mass, fills up voids present in aggregates (fine as well as coarse) & gives strength to concrete on setting & hardening when it's mixed with water.

  • innovation additive in concrete admixture

    innovation additive in concrete admixture

    Nov 09, 2005· Why Add Accelerating Admixtures to Concrete Why Add Accelerating Admixtures to Concrete Nov 9, 2005 Admixtures Concrete Placing John Strieder Accelerators are one of the most popular kinds of chemical admixtur Like water reducers, retarders and plasticizers, when added to a concrete batch either immediately before or during mixing.

  • how to make concrete admixture

    how to make concrete admixture

    Use of Water Reducers, Retarders, and Superplasticizer. Admixtures are used to modify the properties of concrete or mortar to make them more suitable to work by hand or for other purposes such as saving mechanical energy. Water reducing admixtures (WRA) The use of WRA is defined as Type A in ASTM C 494 .

  • admixtures for concrete and their uses - me mining machinery

    admixtures for concrete and their uses - ME Mining Machinery

    The most often used admixtures are air-entraining agents, water reducers, water-reducing retarders and accelerators. Use of Water Reducers, Retarders, and Superplasticizer Water reducers, retarders, and superplasticizers are admixtures for concrete, which are added in order to reduce the water content in a mixture or to slow the setting rate of

  • dealers for admixtures for quick setting of concrete

    dealers for admixtures for quick setting of concrete

    Material Matters: Accelerators - NPCA - Precast concrete Nov 17, 2015· Ketan Sompura, director of concrete technology and admixture and fiber products manager at Sika, said there are four types of accelerators; soluble inorganic salts, soluble organic compounds, quick-setting admixtures and miscellaneous solid materials Admixture companies may

  • concrete machinery concrete admixtures concrete admixtures

    concrete machinery concrete admixtures concrete admixtures

    Retarding admixtures which slow the setting rate of concrete are used to counteract the accelerating effect of hot weather on concrete setting. High temperatures often cause an increased rate of hardening which makes placing and finishing difficult. Retarders keep concrete workable during placement and delay the initial set of concrete. Get Price

  • admixtures for concrete

    admixtures for concrete

    Admixtures are materials in the form of powder or fluids that are added to the concrete to give it certain characteristics not obtainable with plain concrete mixes. Admixtures are defined as additions "made as the concrete mix is being prepared". The most common admixtures are retarders and accelerators. Click for details√

  • how to make concrete admixture

    how to make concrete admixture

    Admixtures are natural or manufactured chemicals which are added to the concrete before or during mix-ing. The most often used admixtures are air-entraining agents, water reducers, water-reducing retarders and accelerators. WHY Use Admixtures? Which admixture increase the strength of concrete? - Quora. Thanks for A2A..

  • durability of concrete additives

    Durability of concrete additives

    Durability in the Precast Product - Precast concrete · Technology in concrete mix design has advanced rapidly for several decades. The need for higher strengths in high-rise buildings has been one motivation.