CAJ | 학술논문

分别采用天然中砂和混合砂(机制砂与天然细砂复配而得)作细集料，对新拌混凝土工作性及硬化混凝土的强度和部分长期性能与耐久性能(抗碳化、收缩、徐变)进行对比研究。结果表明，同配合比下，混合砂混凝土的技术性能与天然中砂混凝土的相当。
분별채용천연중사화혼합사(궤제사여천연세사복배이득)작세집료，대신반혼응토공작성급경화혼응토적강도화부분장기성능여내구성능(항탄화、수축、서변)진행대비연구。결과표명，동배합비하，혼합사혼응토적기술성능여천연중사혼응토적상당。
The natural sand and mixed sand (manufactured sand mixed with natural fine sand) are used as fine aggre-gate, and the workability of fresh concrete, strength and some long-term performance and durability of hardened concrete (carbonization resistance, shrinkage and creep) are comparatively studied. Results show that the properties of concrete made of composite fine aggregates are familiar to those of concrete made from natural middle-size of fine aggregates when the mixture proportion is the same.