Mortar expansions due to delayed ettringite formation. Effects of curing period and temperature

摘要: Abstract The expansion behavior of 55 portland cements, utilizing mortar prisms (40 × 40 160 mm), is reported for a range initial elevated temperature cures followed by storage under water at 20 °C. relationship between and curing condition complex: increasing expansiveness accompanies higher temperatures minimum found to lie 65 °C 70 °C; greatly extended periods result in much reduced expansions, suggesting that progressive neutralization the chemical components critical may be taking place during temperatures. composition cement an important factor determining behavior. Linear correlation coefficients expansions after 100 3 hours compositions show number parameters significant, including %MgO %SO .