Evaluation of effects of C A and SOA contents in Portland cement on its compressive strengt6, hydrat!on rate and products. Three cement samples varFing in C3A content and one varying in SO 3 content were used, hydrated initially at three temperatures. Compressive strength, bound water content, free
Effect of gypsum on the hydration and strength development of commercial portland cements containing alkali sulfates
✍ Scribed by I. Jelenić; A. Panović; R. Halle; T. Gaćeša
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 357 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0008-8846
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In as series of cements made out of clinkers with variable C3A/C4AF ratios and containing different amounts of gypsum, the strength development and the composition of the hydrated material were studied. For a single clinker composition the obtained strength appears to be just a function of porosity.
Na20 and K20 in absence of S03 are incorporated preferentially into the C3A phase of portland clinker altering its modification from cubic to orthorhombic. The hydration of Na20 doped C3A is retarded and that of K20 doped C3A accelerated in the resultant cements. The progress of C3S hydration and st
The experimental investigation is part of a wider research programme, addressed to correlating the modifications in the physical microstructure, due to gypsum addition, with the mechanical behaviour of cement mortars. This fast paper reports on the examination of a series of mortars manufactured wit
The influence of gypsum (G) and anhydrite (A) on the strength and hydration of ordinary Portland cement (OPC) has been investigated. Under an initial steam-curing condition (65°C x 4 h), optimum SO3 contents of both samples were found rising to 4-5% SO3 and a higher optimum strength was gained with
Cement pastes made with different water-cement ratios were hydrated at different temperatures for different times. The main factor influencing the strength properties of the obtained samples was found to be their porosity, however pores with radii of less than 10 nm affected the resultant strength o