Effects of waste paper fibers on early-age shrinkage and pore structure of mortar

被引：0
|
作者：
Jiang Z. [1 ]
Guo X. [1 ,2 ]
Li W. [1 ]
机构：
[1] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai
[2] School of Mechanical & Electrical Engineering, Jinggangshan University, Ji'an
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2016年 / 19卷 / 05期
关键词：
Mortar; Pore structure; Shrinkage; Waste paper fiber(WPF);
D O I：
10.3969/j.issn.1007-9629.2016.05.016
中图分类号：
学科分类号：
摘要：
Waste paper fibers (WPFs) were incorporated into mortar to study the effect of the WPFs on mechanical property, the early-age shrinkage and pore structure of the mortar. The use level of dry WPFs was fixed at 1% and 2% by mass of cement. In addition, the WPFs were mixed with cement using wet mixing and cured with sealed curing and standard curing. Results show that the WPFs do not improve the toughness of mortar with a sealed curing in a water-cement ratio of 0.3, the cumulative pore volume and self-shrinkage are increased instead. However, the WPFs can significantly improve the toughness of mortar in a water-cement ratio of 0.4, and when the use level of WPFs is 1% by mass of cement, the ratio of flexural strength to compressive strength (σF/σC) is highest, cumulative pore volume is lowest and the anti-shrinkage of mortar is enhanced. Moreover, compared with sealed curing, the WPFs do not improve the early-age shrinkage of mortar with a standard curing, but reduce the long-term volume expansion, and the restraint becomes better with the increase of the use level of WPFs. © 2016, Editorial Department of Journal of Building Materials. All right reserved.
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页码：876 / 882
页数：6
相关论文
共 12 条
  • [1] Hu J., Yang X., Zhou Z., Experimental study on tenacity increase characteristics of steel fiber reinforced concrete and polypropylene fiber reinforced concrete under impact load, Journal of Building Materials, 26, 2, pp. 101-105, (2005)
  • [2] Hannantd J., Durability of polypropylene fibers in Portland cement based composites, Cement and Concrete Research, 28, 12, pp. 1809-1817, (1998)
  • [3] Yao W., Ma Y., Tan M., Effects of polypropylene fibers on the physical and mechanical properties of cement based composites (II)-Mechanical properties, Journal of Building Materials, 3, 3, pp. 235-239, (2000)
  • [4] Shah S., Ouyang C., Marikunte S., Et al., A method to predict shrinkage cracking of concrete, ACI Materials Journal, 95, 4, pp. 664-672, (1998)
  • [5] Romualdi J., Batson G., Behaviour of reinforced concrete beams with closely spaced reinforcement, Journal of the American Concrete Institute, 60, 6, pp. 775-789, (1963)
  • [6] Barluenga G., Fiber-matrix interaction at early ages of concrete with short fibers, Cement and Concrete Research, 40, 5, pp. 802-809, (2010)
  • [7] Romildo D., Toledo F., Khosrow G., Et al., Free, restrained and drying shrinkage of cement mortar composites reinforced with vegetable fibers, Cement and Concrete Composites, 27, 5, pp. 537-546, (2005)
  • [8] Kawashima S., Shah S., Early-age autogenous and drying shrinkage behavior of cellulose fiber-reinforced cementitious materials, Cement and Concrete Composites, 33, 2, pp. 201-208, (2011)
  • [9] Guo X., Jiang Z., Ma G., Property evaluation of various lignocellulosic fibers from waste paper, Journal of Harbin Engineering University, 36, 2, pp. 1-5, (2015)
  • [10] Guo X., Jiang Z., Li H., Et al., Production of recycled cellulose fibers from waste paper via ultrasonic wave processing, Journal of Applied Polymer Science, 132, 19, pp. 6211-6218, (2015)
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