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基于当代建筑工程要求,对比研究了碱木质素和木钠对新拌砂浆流动性、保水性,以及对硬化砂浆抗压强度及微观结构的影响。结果表明新拌砂浆减水率随碱木质素、木钠掺量的增加而上升,但掺木钠使新拌砂浆减水率较相同掺量松木碱木质素高;掺木钠时新拌砂浆稠度保持性能远远不如松木碱木质素;砂浆容重随碱木质素、木钠掺量的增加而下降,且相同掺量松木碱木质素使砂浆的容重较木钠低。龄期增大,硬化砂浆抗压强度上升;掺木钠时,砂浆内部聚集成团状或珊瑚状的水化产物,从而使得硬化砂浆结构致密、质地细腻;掺碱木质素时,硬化砂浆中产生大量针状的水化产物,从而使得砂浆结构较疏松。木钠与松木碱木质素均满足工程上所需的保水性能。
Based on the requirements of contemporary construction projects, the effects of alkali lignin and sodium sulfite on the fluidity, water retention, and compressive strength and microstructure of fresh mortar were compared. The results show that the water-reducing rate of fresh mortar increased with the increase of alkali lignin and sodium-sodium dosage, but the water-reducing rate of fresh mortar was higher than that of the same amount of pine alkaloid lignin with sodium dodecyl sulphate; Consistency retention performance is far less than pine alkaloid lignin; mortar weight with alkali lignin, sodium and sodium dosage decreased, and the same amount of pine alkali lignin mortar bulk density lower than sodium. When the age is increased, the compressive strength of the hardened mortar increases; when the sodium is mixed with sodium, the hydrated products are aggregated into clusters or corals in the mortar, so that the hardened mortar has a compact structure and fine texture; when mixed with alkali lignin, Produce a large number of acicular hydration products, making the mortar structure more loose. Sodium sodium and pine alkali lignin meet the required water retention properties.