✦ LIBER ✦

Formation of shrinkage cracks in thin specimens of cement paste

✍ Scribed by S. Chatterji; N. Thaulow; P. Christensen

Publisher: Elsevier Science
Year: 1981
Tongue: English
Weight: 204 KB
Volume: 11
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(81)90018-1

No coin nor oath required. For personal study only.

✦ Synopsis

Whilst being dried a cement paste is simultaneously subjected to peripherical tensile and radial compressive stresses. This combination may lead to relaxation or cracking. It is a general belief that these macroscopic stresses can be ignored if one uses thin specimens. Fluorescence microscopy of 1.5 mm thick paste specimens show that shrinkage cracking occurs even in these specimens. Attention has been drawn to the implications of the above observation.

📜 SIMILAR VOLUMES

Effect of cracking in drying and shrinka

Effect of cracking in drying and shrinkage specimens

✍ Zdeněk P. Baǎnt; Warren J. Raftshol 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 976 KB

The significance of cracking and microcracking caused by nonuniform drying shrinkage of test specimens is analyzed. To assure that no cracks are produced by drying in load-free specimens, one must lower the environmental humidity gradually and sufficiently slowly, and use very thin specimens (about

Significance of pre-existing cracks on n

Significance of pre-existing cracks on nucleation of secondary ettringite in steam cured cement paste

✍ Yan Fu; Ping Xie; Ping Gu; J.J. Beaudoin 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 664 KB

Surface chemistry theories of crystal nucleation in pre-cracked material were examined. It was deduced that nucleation first occurs in cracks satisfying a minimum free energy condition. This concept was used to explain deterioration accompanying secondary ettringite formation in steam cured precast

Development of eigenstress due to drying

Development of eigenstress due to drying shrinkage in hardened portland cement pastes: Thermomechanical analysis

✍ Yan Fu; Ping Gu; Ping Xie; J.J. Beaudoin 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 413 KB

The drying shrinkage of hardened Portland cement pastes with watercement ratio from 0.25 to 0.70 was characterized in terms of shrinkage eigenstress determined by thermomechanical analysis (TMA). The eigenstress development with water loss during thermal drying was investigated using thermogravimetr

Reply to S. Chatterji's discussion of th

Reply to S. Chatterji's discussion of the paper “effect of cracking in drying and shrinkage specimens”

✍ Z.P. Bažant; W.J. Raftshol 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 40 KB

Ice formation in hardened cement paste,

Ice formation in hardened cement paste, part III — Slow resaturation of room temperature cured pastes

✍ Dirch H. Bager; Erik J. Sellevold 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 481 KB

Ice formation in partly dried and very slowly resaturated room temperature cured mature Portland cement pastes has been measured in the temperature range from +10 ° C to -60 ° C. It is demonstrated that there is an aging effect on the ice formation pattern. During resaturation the amount of non-fro

Effect of water and other dielectrics on

Effect of water and other dielectrics on subcritical crack growth in portland cement paste

✍ J.J. Beaudoin 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 302 KB

In studying the effect of water and a series of aliphatic alcohols on subcritical crack growth in cement paste, log crack velocity-stress intensity factor curves were obtained by means of a double-torsion technique. The relative position of the curves was found to be dependent on the dielectric con