𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effect of alkalies on portland cement hydration II. Alkalies present in form of sulphates

✍ Scribed by I. Odler; R. Wonnemann


Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
643 KB
Volume
13
Category
Article
ISSN
0008-8846

No coin nor oath required. For personal study only.

✦ Synopsis


Alkalies present in cement in the form of Na?SO 4 and/or K2SO 4 do not alter the progress of C3S and C3A hydration. The setting time becomes accelerated especially with K2SO 4 due to the formation of syngenite CaSO4.KpSO4"HpO. The compressive strength


πŸ“œ SIMILAR VOLUMES


Alkalies in cement: A review I. Forms of
✍ Inam Jawed; Jan Skalny πŸ“‚ Article πŸ“… 1977 πŸ› Elsevier Science 🌐 English βš– 753 KB

Alkalies in portland cement clinker occur as sulfates and, depending on the amount of SO3 available, may also be present in calcitun silicate and aluminate phases. Introduction of alkalies into clinker minerals modifies their crystal structure which, in turn, can change their hydraulic reactivity. A

Effect of alkalies on portland cement hy
✍ I. Odler; R. Wonnemann πŸ“‚ Article πŸ“… 1983 πŸ› Elsevier Science 🌐 English βš– 315 KB

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

Conduction calorimetric studies of the e
✍ M.A. Smith; J.D. Matthews πŸ“‚ Article πŸ“… 1974 πŸ› Elsevier Science 🌐 English βš– 510 KB

Conduction calorimetry has been used to study the patterns of early heat evolution during the hydration of Portland cement. In particular, the effect of sulphate on the rate of heat liberation has been investigated with reference to the differences observed depending on whether the sulphate is prese

Investigations on the relationship betwe
✍ I. Odler; M. Râßler πŸ“‚ Article πŸ“… 1985 πŸ› Elsevier Science 🌐 English βš– 424 KB

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