TY - JOUR AU - Li, Zhengqi PY - 2017/06/30 Y2 - 2024/03/29 TI - Predicting the drying shrinkage behavior of high strength portland cement mortar under the combined influence of fine aggregate and steel micro fiber JF - Materiales de Construcción JA - Mater. constr. VL - 67 IS - 326 SE - Research Articles DO - 10.3989/mc.2017.05916 UR - https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2173 SP - e119 AB - The workability, 28-day compressive strength and free drying shrinkage of a very high strength (121-142 MPa) steel micro fiber reinforced portland cement mortar were studied under a combined influence of fine aggregate content and fiber content. The test results showed that an increase in the fine aggregate content resulted in decreases in the workability, 28-day compressive strength and drying shrinkage of mortar at a fixed fiber content. An increase in the fiber content resulted in decreases in the workability and drying shrinkage of mortar, but an increase in the 28-day compressive strength of mortar at a fixed fine aggregate content. The modified Gardner model most accurately predicted the drying shrinkage development of the high strength mortars, followed by the Ross model and the ACI 209R-92 model. The Gardner model gave the least accurate prediction for it was developed based on a database of normal strength concrete. ER -