Compatibility of superplasticizers with different cements
The effect of dosage of superplasticizers on the setting time of various cements was determined as per BIS 4031 (1988). The results are given in Table 6.Concrete cubes of 150 mm size with mix design (1:1.2:2.8, cement content=490 kg/m 3, coarse/fine aggregate ratio 30:70) bearing all the superplasticizers at the dose level as recommended by the manufactures were cast at a slump of 40–50 mm.
Superplasticizer compatibility with cement properties – A study
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...
Compatibility of superplasticizers with cements different
Conclusions. The findings obtained from the study on the compatibility of a superplasticizing admixture with cements different in composition are briefly outlined below. (i) Cement content providing the highest strength gain in concrete changes with the kind of cement used.
Compatibility analysis of superplastisizers with different
Based on the experiments, it was established which superplasticizers should be used for cements of a certain mineral composition. Properties of cement CEM II/A-S 32.5 R
Influence of Superplasticizers on Blended Cement and Their
In this examination, flow pattern is studied for mortars for different types of superplasticizers for minimum and maximum percentage replacement levels (0 and 50%) as per IS 383-2016 of fine aggregates by PGBS for varied dosages of SP and its types, and the compatibility between PPC and SP is noted for different w/c ratios.
- 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.
- What is a superplasticizer in cement mix?
- Superplasticizers (SP) are one of the most important constituents of cement cementitious mix mixes. It makes cementitious mix flowable at a low water-cement ratio without segregation and bleeding as required for high-performance concrete .
- Why is superplasticizer incompatibility a problem?
- The cement–admixture (superplasticizer) incompatibility may affect both the fresh state and hardened properties of the cementitious mix - the main ones are rapid loss of workability, excessive quickening/retarding of setting times, low strength gain, excessive air entrainment, and increased risk of shrinkage with moderate cracking.
- Why do we need a superplasticizer for RMC admixtures?
- With the advent and penetration of Ready Mixed Cement Concrete mix (RMC) in the sub-continent, brighter days are awaiting super plasticized admixtures as RMCs have to travel a lot which requires the cementitious mixes to retain their fresh state for long. To increase the retention time, one needs the action of superplasticizers.
- 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
- Which factors affect the adsorption of superplasticizer admixtures?
- They concluded that the admixture/superplasticizer structure and sulfate content of the system were the factors with the greatest impact on the adsorption of superplasticizer on the cubic C 3 A. Orthorhombic C 3 A, reacting more intensely in the presence of sulfate, showed less affinity for the superplasticizer admixtures .
