✦ LIBER ✦

A calorimetric study of early hydration of alkali-slag cements

✍ Scribed by Caijun Shi; Robert L. Day

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 969 KB
Volume: 25
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(95)00126-w

No coin nor oath required. For personal study only.

✦ Synopsis

This paper examines the early hydration of alkali-slag cements activated by different sodium compounds, such as NaOH, Na&O,, Na$iO,.SH,O, Na,PO.,, N%HPO, and NaF, at 25 and 50°C. A conduction calorimeter was used to monitor hydration kinetics. It was found that the initial pH of activator solution has an important role in dissolving the slag and in promoting the early formation of some hydration products. However, further hydration of alkali-slag cements is dominated by the reaction of the anion or anion group of activator and the Ca" dissolved from slag rather than the initial pH of the activator solution. Finally, three models were proposed to describe the early hydration of alkali-slag cements based on heat evolution measurements.

📜 SIMILAR VOLUMES

Hydration products of alkali activated s

Hydration products of alkali activated slag cement

✍ Shao-Dong Wang; Karen L. Scrivener 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 958 KB

This paper presents some recent research on the microstructural development during alkaline activation of slag pastes. Pastes of different slags activated with a range of activators have been prepared and some preliminary results from the study of the pastes activated with sodium hydroxide and water

Microwave study of hydration of slag cem

Microwave study of hydration of slag cement blends in early period

✍ X. Zhang; X.Z. Ding; T.H. Lim; C.K. Ong; B.T.G. Tan; J. Yang 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 667 KB

Microwave technique were used to investigate the early hydration of slag cement with different slag percentages, different activators and different amount of activator. It is found that higher slag cement causes a higher dielectric constant E and a shorter induction period. But higher slag cement sa

Kinetic study on hydration of alkali-act

Kinetic study on hydration of alkali-activated slag

✍ Zhou Huanhai; Wu Xuequan; Xu Zhongzi; Tang Mingshu 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 344 KB

Kinetic study on hydration of alkali-act

Kinetic study on hydration of alkali-activated slag

✍ Zhou Huanhai; Wu Xuequan; Xu Zhongzi; Tang Mingshu 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 344 KB

The mechanism and kinetics of hydration of alkali-activated slag (AAS) have been studied. Heat of hydration, non-evaporable water content and hydration degree of AAS were examined. Similar to ordinary Portland cement (OPC), the hydration process of AAS could be classified into five stages: initial,

A conduction calorimetric study of gasif

A conduction calorimetric study of gasifier slag-portland cement blends

✍ C.H. Bland; J.H. Sharp 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 418 KB

Gasifier slag (GS) is intermediate in chemical composition between granulated blast furnace slag (BFS) and pulverised fuel ash (PFA). A conduction calorimetric study has been made of three GS, blended with aft ordinary Portland cement (OPC) and a sulphate-resisting Portland cement (SRPC). These re

NMR studies of hydrating cement: A spin-

NMR studies of hydrating cement: A spin-spin relaxation study of the early hydration stage

✍ L. Miljkovic; D. Lasic; J.C. MacTavish; M.M. Pintar; R. Blinc; G. Lahajnar 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 305 KB

The early stages of cement hydration were investlgated by proton spinspin relaxation time (T c) measurements because these experiments can be performed much faster (in several seconds) than the characterlstlc time for a change in hydration evolution. In addition, comparing the free induction decays