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A platform for research: civil engineering, architecture and urbanism
Lightweight UHPC (Ultra High Performance Concrete) steel tube concrete and preparation method thereof
The invention provides light UHPC (Ultra High Performance Concrete) steel tube concrete and a preparation method thereof. The lightweight UHPC provided by the invention comprises the pre-wetted lightweight aggregate and the expanding agent, the lightweight UHPC is poured into the steel pipe to obtain the steel pipe concrete, and under the matching action of the pre-wetted lightweight aggregate and the expanding agent, a large amount of Ca (OH) 2 and AFt (ettringite) with an expansion effect are generated in the core concrete; meanwhile, due to the sealing effect of the steel pipe and the internal curing effect of the pre-wetted lightweight aggregate, the relative humidity in the UHPC is maintained, the expanding agent is promoted to continuously exert the expanding effect, and the problem that the expanding power is insufficient due to water shortage in the later hydration period of the expanding agent is solved; the pre-wetted lightweight aggregate and the expanding agent enable the core concrete to have the micro-expansion characteristic, so that the bonding strength and the hooping effect between the steel pipe and the core concrete are improved, and the problem of void generally existing in an existing steel pipe concrete structure is effectively solved.
本发明提供了一种轻质UHPC钢管混凝土及制备方法；本发明提的轻质UHPC，包括预湿后的轻骨料和膨胀剂，利用轻质UHPC灌注在钢管内得到钢管混凝土，在预湿后的轻骨料和膨胀剂的匹配作用下，在核心混凝土内部生成了大量有膨胀效应的Ca(OH)2以及AFt(钙矾石)，同时由于钢管的密闭效应和预湿轻骨料的内养护效应，维持了UHPC内部的相对湿度，促进了膨胀剂持续发挥膨胀效应，解决了膨胀剂在水化后期因缺水导致的膨胀动力不足的问题；预湿后的轻骨料和膨胀剂使得核心混凝土具备了微膨胀特性，以此增加了钢管与核心混凝土间的黏结强度和套箍作用，从而有效解决了现有钢管混凝土结构中普遍存在的脱空问题。
Lightweight UHPC (Ultra High Performance Concrete) steel tube concrete and preparation method thereof
The invention provides light UHPC (Ultra High Performance Concrete) steel tube concrete and a preparation method thereof. The lightweight UHPC provided by the invention comprises the pre-wetted lightweight aggregate and the expanding agent, the lightweight UHPC is poured into the steel pipe to obtain the steel pipe concrete, and under the matching action of the pre-wetted lightweight aggregate and the expanding agent, a large amount of Ca (OH) 2 and AFt (ettringite) with an expansion effect are generated in the core concrete; meanwhile, due to the sealing effect of the steel pipe and the internal curing effect of the pre-wetted lightweight aggregate, the relative humidity in the UHPC is maintained, the expanding agent is promoted to continuously exert the expanding effect, and the problem that the expanding power is insufficient due to water shortage in the later hydration period of the expanding agent is solved; the pre-wetted lightweight aggregate and the expanding agent enable the core concrete to have the micro-expansion characteristic, so that the bonding strength and the hooping effect between the steel pipe and the core concrete are improved, and the problem of void generally existing in an existing steel pipe concrete structure is effectively solved.
本发明提供了一种轻质UHPC钢管混凝土及制备方法；本发明提的轻质UHPC，包括预湿后的轻骨料和膨胀剂，利用轻质UHPC灌注在钢管内得到钢管混凝土，在预湿后的轻骨料和膨胀剂的匹配作用下，在核心混凝土内部生成了大量有膨胀效应的Ca(OH)2以及AFt(钙矾石)，同时由于钢管的密闭效应和预湿轻骨料的内养护效应，维持了UHPC内部的相对湿度，促进了膨胀剂持续发挥膨胀效应，解决了膨胀剂在水化后期因缺水导致的膨胀动力不足的问题；预湿后的轻骨料和膨胀剂使得核心混凝土具备了微膨胀特性，以此增加了钢管与核心混凝土间的黏结强度和套箍作用，从而有效解决了现有钢管混凝土结构中普遍存在的脱空问题。
Lightweight UHPC (Ultra High Performance Concrete) steel tube concrete and preparation method thereof
一种轻质UHPC钢管混凝土及制备方法
ZHANG GAOZHAN (author) / QI DAPENG (author) / DING QINGJUN (author) / SUN DAOSHENG (author) / DING YI (author) / LI YANG (author) / QIAN HAO (author) / YANG JUN (author) / LI MAO (author) / YUAN YANG (author)
2023-03-21
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
E04C
STRUCTURAL ELEMENTS
,
Bauelemente
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