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Open AccessArticle

Experimental Study on Unconfined Compression Strength of Polypropylene Fiber Reinforced Composite Cemented Clay

1
School of Architectural Construction, Institute of Applied Technology of Construction Industrialization and Information, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, China
2
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(4), 247; https://doi.org/10.3390/cryst10040247
Received: 3 March 2020 / Revised: 22 March 2020 / Accepted: 23 March 2020 / Published: 26 March 2020
The effects of three main factors, including polypropylene fiber content, composite cement content and curing time on the unconfined compressive strength of fiber-reinforced cemented clay were studied through a series of unconfined compressive strength tests. The experimental results show that the incorporation of fibers can increase the compressive strength and residual strength of cement-reinforced clay as well as the corresponding axial strain when the stress peak is reached compared with cement-reinforced clay. The compressive strength of fiber-reinforced cement clay decreases first, then increases with small-composite cement at curing time 14 d and 28 d. However, fiber-reinforced cement clay’s strength increases with the increase of fiber content for heavy-composite cement. The compressive strength of fiber-composite cement-reinforced marine clay increases with the increase of curing time and composite cement content. The growth rate increases with the increase of curing time. The failure mode of composite cement-reinforced clay is brittle failure, while the failure mode of fiber-reinforced cemented clay is plastic failure.
Keywords: fiber-reinforced cemented clay; unconfined compression strength; fiber content; composite cement content; curing time fiber-reinforced cemented clay; unconfined compression strength; fiber content; composite cement content; curing time
MDPI and ACS Style

Cheng, Q.; Zhang, J.; Zhou, N.; Guo, Y.; Pan, S. Experimental Study on Unconfined Compression Strength of Polypropylene Fiber Reinforced Composite Cemented Clay. Crystals 2020, 10, 247.

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