Use of Water Reducers, Retarders, and Superplasticizer
Dosage needed for a concrete mixture is unique and determined by the Marsh Cone Test. There are four types of superplasticizers: sulfonated melamine, sulfonated naphthalene, modified lignosulfonates and a combination of high dosages of water reducing and accelerating admixtures.
Effectiveness Assessment of Superplasticizer Admixtures: Case
The use of superplasticizers in concrete production has become a common practice, especially when a high fluidity is required. On the other hand, the risk of segregation and the stability of...
MasterGlenium 3030 | Master Builders Solutions - North America
MasterGlenium 3030 admixture meets ASTM C 494/C 494M requirements for Type A, water-reducing, and Type F, high-range water-reducing, admixtures. Recommended uses of MasterGlenium 3030 concrete superplasticizer: Concrete where high flowability, high-early and ultimate strengths and increased durability are needed; Self-consolidating concrete
Mix Design for High Strength Concrete with Fly Ash, Silica
Scholars have researched the mix design of HSC employing fly ash, silica, and ether-based superplasticizers in great detail. A mix design for HSC was suggested in a study by Basha et al. (2017) [4] with a goal compressive strength of 90 MPa. 180 kg/m3 of fly ash, 70 kg/m3 of silica fume, and 0.75%
Mix Design With Superplasticizers - Civil Engineering Portal
The Superplasticizers are broadly classified into four groups: sulfonated melamine formaldehyde condensate (SMF), sulphonated naphthalene formaldehyde condensate (SNF), modified lignosulphonate (MLS) and others including sulphonic acid ester, polyacrylates, polystryrene sulphonates, etc.
- What is the minimum strength of M-20 concrete?
- a) Specified minimum strength = 20 N/Sq mm The final mix proportions of M-20 grade of concrete become:- Note: 1 The above recommended mix design must be verified, by actual cube tests. 2 The mix design is based on the quality and grading of the materials actually supplied, by the client.
- Do superplasticizers reduce water in concrete mixes?
- The benefits obtained by Superplasticizers in the reduction of water in the concrete mixes are best illustrated by the following examples. With PPC (Flyash based) conforming to IS:1489-part-I-1991. 7 days strength 38.5 N/mm 2.
- What is a concrete admixture dosage?
- The dosage is usually defined based on the cement content (expressed as a percentage by weight of cement or %bwc). Concrete admixtures have a significant impact on the fresh and/or hardened concrete properties. Admixtures can act chemically and/or physically on the cement hydration.
- What is admixture & how does it work?
- Admixture allowing for control of alkali-silica reaction (ASR) in high-alkali concrete. Application minimizes deleterious expansions in concrete due to ASR and increases durability and life span of the concrete structure.
- What is concrete mix design?
- Concrete mix design is the process of finding right proportions of cement, sand and aggregates for concrete to achieve target strength in structures. So, concrete mix design can be stated as Concrete Mix = Cement:Sand:Aggregates. The concrete mix design involves various steps, calculations and laboratory testing to find right mix proportions.
- What is Polycarboxylate ether based superplasticizer technology?
- The major characteristic of polycarboxylate ether-based superplasticizer technology is its targeted polymer design to achieve specific concrete properties. The mode of action is based on the adsorption of the PCE onto the cement grain and dispersion of the particles by electrostatic repulsion and steric hindrance.
