混凝土与水泥制品
混凝土與水泥製品
혼응토여수니제품
China Concrete and Cement Products
2015年
11期
12-15
,共4页
郭丽萍%谌正凯%杨亚男%陈波
郭麗萍%諶正凱%楊亞男%陳波
곽려평%심정개%양아남%진파
高延性水泥基复合材料%高炉矿渣%力学性能%弯曲韧性%多缝开裂
高延性水泥基複閤材料%高爐礦渣%力學性能%彎麯韌性%多縫開裂
고연성수니기복합재료%고로광사%역학성능%만곡인성%다봉개렬
High-ductility cementitious composites%Blast furnace slag%Mechanical properties%Flexural toughness%Multiple cracking
高延性水泥基复合材料（High Ductility Cementitious Composites，HDCC）是指在弯曲和拉伸荷载作用下具有应变硬化特性的水泥基复合材料，具有单轴拉伸延性好，耐久性能优异等优点。在材料设计中用大掺量的粉煤灰来替代水泥，以实现更加优异的高延性。本文研究了在聚乙烯醇（polyvinyl alcohol，PVA）纤维体积掺量为1.2%和1.4%时，同时掺入高炉矿渣与粉煤灰制备高延性水泥基复合材料，通过改变高炉矿渣与粉煤灰的掺量，得到试件的抗压强度、抗折强度与弯曲韧性，用以对比矿渣与粉煤灰不同质量比例对高延性水泥基复合材料力学性能、弯曲韧性和表面裂纹特征的影响规律。结果显示，当矿渣和粉煤灰掺量分别为总胶凝材料质量的40%和10%时，试件呈现出良好的应变硬化与多缝开裂特性，最大挠度达到10.79mm，极限拉应变为1.26%，裂纹数量达到14条。表明了矿渣的掺入有利于在保证高延性水泥基复合材料具有应变硬化特性的前提下，可以有效提高高延性水泥基复合材料中的强度和弯曲韧性，对于此类材料的工程应用十分有益。
高延性水泥基複閤材料（High Ductility Cementitious Composites，HDCC）是指在彎麯和拉伸荷載作用下具有應變硬化特性的水泥基複閤材料，具有單軸拉伸延性好，耐久性能優異等優點。在材料設計中用大摻量的粉煤灰來替代水泥，以實現更加優異的高延性。本文研究瞭在聚乙烯醇（polyvinyl alcohol，PVA）纖維體積摻量為1.2%和1.4%時，同時摻入高爐礦渣與粉煤灰製備高延性水泥基複閤材料，通過改變高爐礦渣與粉煤灰的摻量，得到試件的抗壓彊度、抗摺彊度與彎麯韌性，用以對比礦渣與粉煤灰不同質量比例對高延性水泥基複閤材料力學性能、彎麯韌性和錶麵裂紋特徵的影響規律。結果顯示，噹礦渣和粉煤灰摻量分彆為總膠凝材料質量的40%和10%時，試件呈現齣良好的應變硬化與多縫開裂特性，最大撓度達到10.79mm，極限拉應變為1.26%，裂紋數量達到14條。錶明瞭礦渣的摻入有利于在保證高延性水泥基複閤材料具有應變硬化特性的前提下，可以有效提高高延性水泥基複閤材料中的彊度和彎麯韌性，對于此類材料的工程應用十分有益。
고연성수니기복합재료（High Ductility Cementitious Composites，HDCC）시지재만곡화랍신하재작용하구유응변경화특성적수니기복합재료，구유단축랍신연성호，내구성능우이등우점。재재료설계중용대참량적분매회래체대수니，이실현경가우이적고연성。본문연구료재취을희순（polyvinyl alcohol，PVA）섬유체적참량위1.2%화1.4%시，동시참입고로광사여분매회제비고연성수니기복합재료，통과개변고로광사여분매회적참량，득도시건적항압강도、항절강도여만곡인성，용이대비광사여분매회불동질량비례대고연성수니기복합재료역학성능、만곡인성화표면렬문특정적영향규률。결과현시，당광사화분매회참량분별위총효응재료질량적40%화10%시，시건정현출량호적응변경화여다봉개렬특성，최대뇨도체도10.79mm，겁한랍응변위1.26%，렬문수량체도14조。표명료광사적참입유리우재보증고연성수니기복합재료구유응변경화특성적전제하，가이유효제고고연성수니기복합재료중적강도화만곡인성，대우차류재료적공정응용십분유익。
High-ductility cementitious composites (HDCC) refers to the cementitious composites with strain hardening properties under bending and tension loading, which has good uniaxial tensile ductility, excellent durability, etc. High con-tent of fly ash is used to replace the cement in order to achieve more excellent ductility. In this study, the volume content of PVA fiber was 1.2%and 1.4%, the blast furnace slag and fly ash added into HDCC. By changing the blast furnace slag and fly ash content, the compressive strength, flexural strength and flexural toughness of specimen obtained to reveal the influence of different mass ratio of slag and fly ash on the mechanical properties, toughness and surface crack characteris-tics of HDCC. The results showed that when the slag and fly ash were 40% and 10% of the total mass of cementitious ma-terials, the specimen showed a good strain hardening and multiple cracking characteristics, maximum deflection reached 10.79mm, tensile strain capacity of 1.26% and the number of cracks was 14. The incorporation of slag was beneficial to ensure the high ductility of HDCC and effectively improved the strength and flexural toughness of HDCC, which was very useful for engineering applications of these materials.
