The study of tension strenghth for different length P.P fibers reinforced concrete

• Main Authors: Ling-jie weng, 翁聆傑
• Other Authors: 林至聰
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/375r3z

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 95 === It is lasting for long time in many countries that engineers added Polypropylene（p.p）fibers properly into conventional concrete to improve the strength behaviors of concrete. However, except crack resistance and toughness capabilities surely increased, there were not a clear specification to specify the range of strength behaviors improved and the application result. Thus, it might causes wrong applications and potential damages. This research focuses on the concerning described above, through test results to identify the expectation of design theory and the suitability of actual application. We made 324 specimens totally by adding four dosages of p.p fiber（0 %, 0.33 %, 0.67 % & 1 % fiber volume added）and get three of them with same quality but diverse length p.p fiber(2 cm,4 cm,6 cm) into three different kinds of plain concrete（210㎏/cm2、280㎏/cm2 & 350㎏/cm2）, each of three specimens were tested for studying the behavior of flexure strength, compression strength and Splitting Tensile Strength separately. As the result of experiment, the mechanical tension of p.p fiber concrete did not increase greatly as the fiber percent of volume added. However, there are massive improvement on the mode of the damage for the specimens, also the capabilities of toughness has greatly increased. The test results indicated that the p.p fiber concrete increased as the percentage of volume fiber increased, also the crack resistance and toughness capabilities are more effectively. The model of damage for the specimens tends to be broken slightly instead of broken directly. The end result for the damage of the specimens did not broken completely. Therefore, the experimental evidence apply the theory of the specimens would not break up but slightly damage.