Study on Fracture Energy of Cement Stabilized Aggregate

2011 ◽  
Vol 291-294 ◽  
pp. 1141-1144 ◽  
Author(s):  
Xiao Hang Wei ◽  
Peng Zhang
Keyword(s):  
Crack Propagation ◽  
Fracture Energy ◽  
Cement Content ◽  
Three Point Bending ◽  
Curing Period ◽  
Resist Crack Propagation

A series of parametric tests have been conducted to investigate the effect of curing period and cement content of the specimen on fracture energy of cement stabilized aggregate. By means of three-point bending method, the fracture energy of cement stabilized aggregate was measured. Four specimen curing periods (14 d, 28 d, 60 d and 90 d) and four different cement contents (4%, 5%, 6% and 7%) were used. The results indicate that the fracture energy of cement stabilized aggregate is increasing with the increase of specimen curing period. Besides, with the increase of cement content, there is a tendency to decrease in the fracture energy of cement stabilized aggregate. The ability of cement stabilized aggregate to resist crack propagation becomes weaker and weaker with the increase of cement content.

The Comparison of Self-Compacting Rock-Filled Concrete with Large-Size Natural and Recycled Aggregate

2014 ◽  
Vol 513-517 ◽  
pp. 20-23
Author(s):  
Hai Chao Wang ◽  
Xue Hua Wang ◽  
Xue Hui An
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Fracture Energy ◽  
Fracture Mechanism ◽  
Recycled Aggregate ◽  
Propagation Process ◽  
Fracture Characteristics ◽  
Three Point Bending ◽  
Large Size ◽  
Crack Propagation Process

The different fracture characteristics of self-compacting rock-filled concrete with large-size natural and recycled aggregate are analyzed by three-point bending experiment. According to the analysis of the crack propagation process, the fracture mechanism differences of self-compacting rock-filled concrete with large-size natural and recycled aggregate are discussed. The further analysis of the differences of fracture toughness, fracture energy, and are gain

Study on Fracture Toughness of Cement Treated Aggregate

2011 ◽  
Vol 280 ◽  
pp. 76-79 ◽  
Author(s):  
Xiao Ying Hou ◽  
Peng Zhang ◽  
Ming En Zhang
Keyword(s):  
Fracture Toughness ◽  
Cement Content ◽  
Base Layer ◽  
Three Point Bending ◽  
Curing Period ◽  
Aggregate Base

In order to investigate the effect of curing period and cement content of the specimen on fracture toughness of cement treated aggregate, a series of parametric tests have been conducted. By means of three-point bending method, the fracture toughness of cement treated aggregate was measured. In this study, four specimen curing periods (14 d, 28 d, 60 d and 90 d) and four different cement contents (4%, 5%, 6% and 7%) were used. The results indicate that the fracture toughness of cement treated aggregate is increasing with the increase of specimen curing period. Besides, with the increase of cement content, there is a tendency to decrease in the fracture toughness of cement treated aggregate. The higher cement content will be adverse to prevent the fine fissure inside cement treated aggregate base layer spreading further.

Correlation between Unconfined Compressive Strength and Penetration Index Obtained from DCP Tests for Cemented Lateritic Soils

2019 ◽  
Vol 814 ◽  
pp. 399-403
Author(s):  
Anuchit Uchaipichat
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Cement Content ◽  
Lateritic Soil ◽  
Test Results ◽  
Cone Penetration ◽  
Penetration Index ◽  
Curing Period ◽  
Cemented Soils ◽  
The Relationship

This paper presents the relationship between the dynamic cone penetration (DCP) test results and the unconfined compressive strength of lateritic cemented soils. A series of DCP tests and unconfined compressive strength was performed on lateritic cemented soil. The soils sample used in this study was lateritic soil. The test results for the DCP tests are presented in terms of penetration index. It can be observed that the penetration index decreased with increasing curing period and cement content. Moreover, the unconfined compressive strength of cemented soils increased with curing period and cement content. The relationship between unconfined compressive strength and penetration index is presented. A unique relationship for unconfined compressive strength can be obtained.

Study on Compound Type Crack Propagation Behavior of Asphalt Concrete

2006 ◽  
Vol 324-325 ◽  
pp. 759-762 ◽  
Author(s):  
Tao Xie ◽  
Yan Jun Qiu ◽  
Ze Zhong Jiang ◽  
Chang Fa Al
Keyword(s):  
Crack Initiation ◽  
Crack Propagation ◽  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Traffic Load ◽  
Numerical Code ◽  
Three Point Bending ◽  
Propagation Behavior ◽  
Compound Type ◽  
Crack Propagation Behavior

The furthest dangerous cracking type of asphalt pavement is usually considered of the simplex type crack(namely shear crack) under traffic load, but the so-called type crack should be the compound cracking at the concurrence of I type crack (namely splay crack) and type crack. In order to study the compound type crack propagation behavior of asphalt concrete, a three point bending beam with compound type notched has been designed. Asymmetry-gap small girder specimens of asphalt concrete are adopted in the test, and the central testing equipment is MTS. A series of compound type three point bending beam tests have been performed to simulate compound type crack initiation and growth. The propagation of compound type crack is studied by a newly developed numerical code, Rock Failure Process Analysis (RFPA2D).it is shown that the crack initiation angle and the peak load increased as the distance of the preexisting crack from the midpoint of the beam increased, the crack propagation path follows some regularity in general and the main force of crack propagation is still tensile stress. Through this work, the understanding of the mechanism about damage and early destroy of asphalt pavement can be advanced and it can provide guidance for asphalt pavement design and maintenance.

Sign in / Sign up

Export Citation Format

Share Document