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...
Cement and Superplasticizer Combinations: Compatibility and
Based on the results of this study, a rough prediction of the compatibility and robustness of cements and superplasticizers could be made by analyzing the chemical composition of the cement and the chemical nature of the superplasticizer. Author Information Nkinamubanzi, P-C Advanced Concrete Technology Program, Ottawa, Canada Atcin, P-C
Cement-superplasticiser compatibility - Issues and challenges
Gettu et al. [22] evaluated the robustness of self-compacting concrete, whereas Jayasree et al. [23] experimented compatibility of cement and superplasticizer. Domone [24] presented interesting
Study on the compatibility of cement-superplasticizer system
Liu B J. The compatibility of cement and superplasticizer. Concrete, 2002, (9): 20–25. Sun Z P, Jiang Z W, Wang Y J, et al. Compatibility between concrete admixt ures and cement(in Chinese). J Build Mater, 2002, 5(1): 26–31. Google Scholar Jiang S P, Gikim B, Aitein P C. Importance of adequate soluble alkali content to ensure cement
Compatibility of Polycarboxylate Superplasticizers with
The low alkali cement shows lower sensitivity to differences in structure of polycarboxylate superplasticizers than cements with higher alkali content. The adsorption of polycarboxylate polymers on cement is driven by the structural features of the polymer and can be directly related with the flow of the cement paste.
- 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 .
- Does superplasticizer increase setting times of concrete?
- The addition of superplasticizer to the concrete increases the setting times of the concrete. Table 2. Four M40 grade concrete samples were prepared with 2 brands of cement and 2 types of admixtures and tested for setting times of concrete. The setting time of concrete are determined as per IS: 8142(1976) using penetration resistance apparatus.
- Which superplasticizer is more compatible with brand 2 cement based M40?
- So based on achievement of desired setting times and compressive strengths, it can be concluded that brand 2 cement based M40 concrete (ie, PPC based) is more compatible with SNF based superplasticizer than PCE based superplasticizer. So it is suggested that for the development of PPC based M40 grade concrete SNF superplasticizers can be used.
- What is the penetration resistance of concrete mixes with superplasticizer?
- The penetration resistances of concrete mixes with superplasticizer are shown in Tables 3 to 6. M40 concrete made with SNF based superplasticizer has shown better initial and final setting times of concrete than in concrete made with PCE based superplasticizer.
- 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 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.
