CAJ | 학술논문

研究了磨细石灰石粉、粉煤灰和矿渣掺合料对机制砂砂浆物理力学性能的影响.当矿物掺量由10%向40%递增,结果表明:矿渣试件7d强度下降,28d强度高于基准试件;砂浆流动性提高但保水性降低.粉煤灰试件、石灰石粉试件的7d和28d强度低于基准试件,石灰石粉试件强度降低尤甚;粉煤灰砂浆流动性先升高而后降低,以20%或者30%为拐点,石灰石粉会显著提高砂浆的保水性,但对砂浆强度有不利影响.矿渣与石灰石粉复合制备的砂浆,其稠度、保水性和强度满足工程实际对砂浆的要求,且优于粉煤灰与石灰石粉复合制备的砂浆.
연구료마세석회석분、분매회화광사참합료대궤제사사장물리역학성능적영향.당광물참량유10%향40%체증,결과표명:광사시건7d강도하강,28d강도고우기준시건;사장류동성제고단보수성강저.분매회시건、석회석분시건적7d화28d강도저우기준시건,석회석분시건강도강저우심;분매회사장류동성선승고이후강저,이20%혹자30%위괴점,석회석분회현저제고사장적보수성,단대사장강도유불리영향.광사여석회석분복합제비적사장,기주도、보수성화강도만족공정실제대사장적요구,차우우분매회여석회석분복합제비적사장.
@@@@The influence of ground limestone powder, fly ash and blastfurnace slag on the physical and mechanical properties of manufactured sand mortar was researched. When the mineral content increases from 10%to 40%gradually, the results show that the 7d strength of all mortar specimens is dropped. The 28d strength of blastfurnace slag specimen is higher while the 28d strength of others is lower than that of blank sample, especially for the limestone specimen. Blastfurnace slag can enhance the flowability and reduce the water retention rate of mortars, while fly ash will increase the flowability of mortars to some extent and then decrease it, with 20%or 30%for the inflection point. The adding of limestone powder will improve the water retention rate significantly but have some adverse effects on mortar strength. Consistency, water retention rate and strength of the mortar made with blastfurnace slag and limestone powder meet the practical engineering’s requirement and the mortar performs better than the mortar made with fly ash and limestone powder.