Evaluating Superplasticizer Compatibility in the
PPC benefits include increased long-term strength as a result of the interaction that occurs between pozzolana and Ca (OH) 2 produced during cement hydration, significantly reduced degree of...
Superplasticizer compatibility with cement properties – A
The tricalcium aluminate (C 3 A) phase of cement is one of the most important factors affecting the cement–water reducing admixture/superplasticizer compatibility. The average C 3 A content in cement is 4–11% but it is the most highly reactive phase in clinker and the one with the greatest affinity for superplasticizer admixtures.
Evaluating Superplasticizer Compatibility in the Production
Evaluating Superplasticizer Compatibility in the Production of High Performance Concrete using Portland Pozzolana Cement CEM II/B-P Thomas Omollo Ofwa1, David Otieno Koteng’2, John Nyiro Mwero3
Evaluating Superplasticizer Compatibility in the Production
Evaluating Superplasticizer Compatibility in the Production of High-Performance Concrete using Portland Pozzolana Cement CEM II/B-P Thomas Omollo Ofwa1, David Otieno Koteng’2, John Nyiro Mwero3 1MSc. Student, Department of Civil & Construction Engineering, University of Nairobi, P. O. Box 30197-00100 Nairobi, Kenya
Cement - Superplasticizer Compatibility - The Concrete Portal
Compatibility between cements and superplasticizers is affected by a combination of reasons, including cement composition, admixture type and dosage, concrete mixture proportions etc. Atcin [1998] describes the complicated nature of the interaction using the schematic diagram shown in Figure 2.
- What is a superplasticizer in cement?
- According to ASTM C494, superplasticizers are linear polymers that possess a sulfonic acid group. The addition of superplasticizers into a mix neutralizes the surface interaction among the cement particles and thus, reduces the viscosity of cement paste (free from agglomeration) resulting in reduced pore volume.
- Does superplasticizer -poly carboxylate ether in cement composites increase strength?
- Our paper reports the addition of high performing superplasticizer -Poly Carboxylate Ether in cement composites as per Indian Standards has resulted in a denser cementitious matrix and higher strength gain at longer terms compared to normal superplasticizers. 1. Introduction
- Do superplasticizers affect concrete tensile strength?
- Therefore, the effect of superplasticizers mainly influences the workability of concrete rather mechanical properties. Similarly, previous studies on incorporation of carbon fiber reinforced polymer (CFRP) resulted the split tensile strength of 11.7 MPa .
- How do superplasticizers affect cement pore volume?
- The addition of superplasticizers into a mix neutralizes the surface interaction among the cement particles and thus, reduces the viscosity of cement paste (free from agglomeration) resulting in reduced pore volume. Superplasticizers have high molecular weight and consist of synthetic chemicals and water-soluble polymers.
- Why are superplasticizers used in Indian cementitious mix?
- Superplasticizers are increasingly being used in Indian cementitious mix from the 1980 s onwards as they have proved their credibility in parameters like water and cement reduction apart from workability retention, strength gain, and ease to place and pump.
- Can a superplasticizer be used to make low W/C concrete?
- Experience shows that some cement-superplasticizer combinations can be used to make low W/C concretes that keep a slump of 200 mm during more than 1 h, while drastic slump losses, within 10–15 min, are experienced with other combinations , .
