Polymer-modified concrete with improved flexural toughness and mechanism analysis

Abstract

By selecting different types of polymer mixing into concrete, the toughness of concrete is investigated, and results indicate polymer has obvious effect to improve the toughness of concrete. Microstructure of polymer-modified concrete were studied through environment scanning electron microscope and digital micro-hardness tester, results show that polymer acts as a flexible filler and reinforcement in concrete, and alters the microstructure at mortar and ITZ. By crack path prediction and energy consumption analysis, the crack path of polymer-modified concrete is more tortuous and consumes more energy than that of ordinary concrete.

Keywords

Crack Path / Fiber Reinforce Polymer / Coarse Aggregate / Interface Transition Zone / Ordinary Concrete

References

[1] Cavan Tasdemir, Mehmet A Tasdemir, Nichoals Mills. Combined Effects of Silica Fume, Aggregate Type, and Size on Post-peak Response of Concrete in Bending [J]. ACI Materials Journal, 1999(1):134–156

[2] HUANG Yu-bin. Study on Brittleness and Size Effect of Mechanical Parameters of Concrete and Their Correlation[D]. Chongqing: Chongqing University.

[3] A Benazzouk. Physico-mechanical Properties of Aerated Cement Composites Containing Shredded Rubber Waste[J]. Cement & Concrete Composites, 2006(28):650–657

[4] Dong joo Kim, Antoine E Naaman, Sherif El-Tawil. Comparative Flexural Behavior of Four Fiber Reinforced Cementitious Composites [J]. Cement and Concrete Composites, 2008(30):917–928

[5] M Jamal Shannag, Rune Brincker, Will Hansen. Pullout Behavior of Steel Fibers from Cement-based Composites [J]. Cement and Concrete Research, 1997(27):925–936

[6] Zhong S., Yuan Hua. Polymer in Concrete [M], 2003 Beijing Chemical Industry Press

[7] A I Al-Hadidy, Tan Yiqiu. Mechanistic Approach for Polypropylenemodified Flexible Pavements[J]. Materials & Design, 2009(30):1 133–1 140

[8] Sun Z., Xu Q. Micromechanical Analysis of Polyacrylamidemodified Concrete for Improving Strengths [J]. Materials Science and Engineering A, 2008, 490: 181-192.

[9] Dionys Van Gemert, Lech Czarnecki, Matthias Maultzsch. Cement Concrete and Concrete-polymer Composites: Two Merging Worlds. A Report from 11th ICPIC Congress in Berlin, 2004[J]. Cement and Concrete Composites, 2005(27):926–933

[10] E Knapen, D Van Gemert. Cement Hydration and Microstructure Formation in the Presence of Water-soluble Polymers [J]. Cement and Concrete Research, 2009(39):6–13

[11] A Jenni, R Zurbriggen, L Holzer, et al. Changes in Microstructures and Physical Properties of Polymer-modified Mortars during Wet Storage[J]. Cement and Concrete Research, 2006(36):79–90

[12] A Jenni, L Holzer, R Zurbriggenc, et al. Influence of Polymers on Microstructure and Adhesive Strength of Cementitious Tile Adhesive Mortars [J]. Cement and Concrete Research, 2005(35):35–50

[13] L P Guo, W Sun, A Carpinteri, et al. Mechanism of International Concrete Microstructure by Investigation on Lattice Model in Fatigue Damage[C]. Proceedings of Conference on “Hydration, Microstructure and Durability”, 2008

[14] Li-Ping G., Wei S., Qing-Yu C. Multi-scale Material Design and Crack Path Prediction of a Polymer-modified Cementitious Cover Layer [J]. Computational Materials Science, 2010, 49: 184-189.

[15] Shuguang H.U. Advanced Cement-Based Composite Materials[M], 2009 Beijing Science Press

[16] J M L Reis, A J M. Ferreira. A Contribution to the Study of the Fracture Energy of Polymer Concrete and Fiber Reinforced Polymer Concrete [J]. Polymer Testing, 2004(23):437–440

[17] João Adriano Rossignolo. Interfacial Interactions in Concretes with Silica Fume and SBR Latex [J]. Construction and Building Materials, 2009(23):817–821