A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a quicklime-based expansive admixture that can sufficiently suppress shrinkage during hardening and can prevent the occurrence of cracking without mixing it in such a large amount as to give any troubles to the properties of a hardened body in a cement composition such as mortar and concrete.SOLUTION: The expansive admixture comprises as an active ingredient a mixture of a quicklime-containing particle having a particle size of not less than 20 μm which is substantially coated with diethylene glycol and a quicklime-containing particle having a particle size of less than 20 μm which is substantially coated with diethylene glycol having a mass 3 to 20 times as much as that of diethylene glycol used in coating the mentioned-above particle.SELECTED DRAWING: None
【課題】 モルタルやコンクリート等のセメント組成物において、その硬化体性状に支障を及ぼすほどの大量に混和しなくても硬化時の収縮を十分抑制し、またひび割れ発生を防止することのできる生石灰系の膨張性混和材を提供する。【解決手段】 ジエチレングリコールで実質被覆された粒径２０μｍ以上の生石灰含有粒子と前記被覆に用いらジエチレングリコールの３〜２０倍の質量のジエチレングリコールで実質被覆された粒径２０μｍ未満の生石灰含有粒子との混合物を有効成分とする膨張性混和材。【選択図】 なし
PROBLEM TO BE SOLVED: To provide a quicklime-based expansive admixture that can sufficiently suppress shrinkage during hardening and can prevent the occurrence of cracking without mixing it in such a large amount as to give any troubles to the properties of a hardened body in a cement composition such as mortar and concrete.SOLUTION: The expansive admixture comprises as an active ingredient a mixture of a quicklime-containing particle having a particle size of not less than 20 μm which is substantially coated with diethylene glycol and a quicklime-containing particle having a particle size of less than 20 μm which is substantially coated with diethylene glycol having a mass 3 to 20 times as much as that of diethylene glycol used in coating the mentioned-above particle.SELECTED DRAWING: None
【課題】 モルタルやコンクリート等のセメント組成物において、その硬化体性状に支障を及ぼすほどの大量に混和しなくても硬化時の収縮を十分抑制し、またひび割れ発生を防止することのできる生石灰系の膨張性混和材を提供する。【解決手段】 ジエチレングリコールで実質被覆された粒径２０μｍ以上の生石灰含有粒子と前記被覆に用いらジエチレングリコールの３〜２０倍の質量のジエチレングリコールで実質被覆された粒径２０μｍ未満の生石灰含有粒子との混合物を有効成分とする膨張性混和材。【選択図】 なし
EXPANSIVE ADMIXTURE
膨張性混和材
NAKAJIMA YUTAKA (author)
2016-07-11
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2019