USE OF CRUMB RUBBER TO ACHIEVE FREEZE/THAW RESISTING CONCRETE

2002 ◽  
pp. 485-498 ◽  
Author(s):  
K A Paine ◽  
R K Dhir ◽  
R Moroney ◽  
K Kopasakis
Keyword(s):  
Crumb Rubber ◽  
Freeze Thaw

scholarly journals Mechanical Properties, Permeability, and Freeze–Thaw Resistance of Pervious Concrete Modified by Waste Crumb Rubbers

2018 ◽  
Vol 8 (10) ◽  
pp. 1843 ◽  
Author(s):  
Hanbing Liu ◽  
Guobao Luo ◽  
Yafeng Gong ◽  
Haibin Wei
Keyword(s):  
Mechanical Properties ◽  
Urban Areas ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Pervious Concrete ◽  
Negative Effects ◽  
Freeze Thaw ◽  
Urban Heat ◽  
Island Phenomena ◽  
Pavement Material

Due to the negative effects that derive from large impervious surfaces in urban areas, pervious concrete has been developed, and has become an environmentally friendly pavement material. As a porous and permeable material, pervious concrete presents an overwhelming advantage in solving urban problems, such as flooding, groundwater decline, urban heat island phenomena, etc. Waste crumb rubber has been verified as a feasible modifier for pavement material. The objective of this paper is to explore the effects of rubber particle size and incorporation level on the permeability, mechanical properties, and freeze–thaw resistance of pervious concrete. Two kinds of rubbers (fine and coarse) with four incorporation levels (2%, 4%, 6%, and 8%) are used in the experiment. Permeability, compressive strength, flexural strength, flexural strain, and freeze–thaw resistance are tested. The results indicate that the addition of rubber slightly decreases strength and permeability, but significantly enhances ductility and freeze-thaw resistance. Fine crumb rubber with a suitable incorporation level could remarkably improve the ductility and freeze–thaw resistance of pervious concrete without sacrificing excessively strength and permeability.

scholarly journals Experimental Study on Freeze-Thaw Effects on Creep Characteristics of Rubber Concrete

2022 ◽  
Vol 2022 ◽  
pp. 1-14
Author(s):  
Qi Li ◽  
Fei Xu ◽  
Hemin Zheng ◽  
Junhao Shi ◽  
Jianyu Zhang
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Stress Level ◽  
Creep Behavior ◽  
Mass Loss Rate ◽  
Crumb Rubber ◽  
Dynamic Elastic Modulus ◽  
Freeze Thaw ◽  
Stress Levels ◽  
Rubber Concrete

Crumb Rubber Concrete (CRC) can exhibit high freeze-thaw resistance, but its long-term creep behavior under various freeze-thaw conditions remains unclear, which is essential for the safety of pavement engineering in the severe cold zone. In this study, the freeze-thaw effects on the creep behavior of CRC under different stress levels were systematically analyzed by testing the compressive strength, the uniaxial creep under different stress levels, and the dynamic elastic modulus. To simulate real conditions of the road environment in the cold area, the lowest temperature of −20°C, six freeze-thaw cycles of 0, 30, 60, 90, 120, and 150, and seven different stress levels of 0.4, 0.5, 0.6, 0.7, 0.8, and 0.9 of the compressive strength were employed in this study. The test results showed that the mass loss rate was 6%–11.2% and the compressive strength decreased by 6.51%–47% after 30–150 freeze-thaw cycles. When the stress level reached its critical value, the relative dynamic elastic modulus decreased with the number of freeze-thaw cycles. After 150 freeze-thaw cycles, failure did not appear when the stress level was lower than 50%, above which the creep failure was determined by the stress level and the number of the freeze-thaw cycles. Meanwhile, it was found that the cracking and interfacial debonding between the matrix and the crumb rubber particle were the main reasons for the degradation of CRC creep performance. Finally, a Weibull distribution-based empirical creep damage model was established to predict the failure of CRC, which can enhance its application to related engineering.

scholarly journals Study on the Vibration Isolation Performance of Composite Subgrade Structure in Seasonal Frozen Regions

2020 ◽  
Vol 10 (10) ◽  
pp. 3597
Author(s):  
Leilei Han ◽  
Haibin Wei ◽  
Fuyu Wang
Keyword(s):  
Vibration Isolation ◽  
Plate Thickness ◽  
Vertical Direction ◽  
Crumb Rubber ◽  
Isolation Effect ◽  
Silty Clay ◽  
Freeze Thaw ◽  
Vibration Isolation Performance ◽  
Isolation Performance ◽  
Modified Soil

Silty clay modified by fly ash and crumb rubber is a kind of sustainable subgrade filler that has good freeze–thaw resistance stability, but weak vibration isolation performance. The objective of this study was to improve the vibration isolation of the modified soil and investigate the vibration isolation effect of the composite subgrade structure of extruded polystyrene (XPS) plates and the modified soil by the indoor impact test. First, the vibration isolation performance of silty clay, modified soil, and composite subgrade structure was respectively evaluated. Second, the effect of the XPS plate’s thickness and vibration intensity on the vibration performance of the composite subgrade structure were evaluated. Third, the vibration isolation performance of the test groups under the condition of freeze–thaw cycles was assessed. The results show that the vibration isolation performance of the subgrade can be effectively improved by setting XPS plates. The composite subgrade structure has a certain vibration isolation effect, especially in the vertical direction. Considering the vibration isolation performance and costs, 5 cm was the optimum XPS plate thickness. The composite subgrade structure showed a great vibration isolation performance under the condition of freeze–thaw cycles, so it is suitable for application in road subgrade in seasonal frozen regions.

The fatigue behavior of polymeric sulfur-modified asphalt mixtures subjected to freeze-thaw conditioning

2019 ◽  
pp. 089270571988998 ◽  
Author(s):  
Amir Kavussi ◽  
Mehdi Azarnia ◽  
Pooyan Ayar ◽  
Makan Pedram
Keyword(s):  
Fatigue Life ◽  
Fatigue Behavior ◽  
Fatigue Cracking ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Experimental Results ◽  
Moisture Sensitivity ◽  
Modified Asphalt ◽  
Freeze Thaw ◽  
Brittle Behavior

Abundance, affordability, and also the usability of sulfur as a part of the binder are the main reasons for using this additive in asphalt mixtures. However, lack of proper adhesion and brittle behavior of sulfur-modified asphalt mixtures could make them susceptible to moisture damage and fatigue cracking. In this regard, anti-stripping agents and some polymers like crumb rubber may be used to overcome these types of distresses. This research aimed at investigating the effects of polymeric sulfur and crumb rubber on the moisture sensitivity and fatigue behavior of asphalt mixtures. To this end, asphalt mixtures were subjected to 1 and 3 freeze-thaw cycles. Then, an indirect tensile fatigue test was carried out. Moreover, the response surface method (RSM) was used to assess the interaction between various parameters in samples containing polymeric sulfur and crumb rubber. Results showed that with an increase in polymeric sulfur content, the fatigue life was reduced and the moisture sensitivity was increased. Additionally, the RSM was found to be effective in ranking parameters influencing the performance of asphalt mixtures. According to the experimental results, a crumb rubber-modified binder could improve the fatigue life of the polymeric sulfur-modified mixture up to 70%. Furthermore, experimental results and RSM analysis indicated that crumb rubber would be more effective in higher numbers of freeze-thaw cycles and raised temperatures, in which polymeric sulfur-modified asphalt mixtures are probably prone to moisture damages (i.e. the lack of adequate cohesion and adhesion).

Investigation of freeze-thaw mechanism for crumb rubber concrete by the online strain sensor

Measurement ◽  
2021 ◽  
pp. 109080
Author(s):  
Yujiang Gou ◽  
Lihua Zhang ◽  
Chuanbei Liu ◽  
Hongping Zhang ◽  
Cheng Wei ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Crumb Rubber ◽  
Freeze Thaw ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

scholarly journals Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Haibin Wei ◽  
Ziqi Li ◽  
Yubo Jiao
Keyword(s):  
Tensile Strength ◽  
Prediction Models ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Stiffness Modulus ◽  
Freeze Thaw ◽  
Stone Mastic Asphalt ◽  
Indirect Tensile ◽  
Air Void ◽  
Styrene Butadiene

Asphalt mixture is susceptible to moisture damage under the effect of freeze-thaw (F-T) cycles. In this paper, crumb rubber (CR) was used to modify stone mastic asphalt (SMA) and the effects of diatomite and styrene butadiene styrene (SBS) on antifreezing performances of crumb rubber modified SMA (CRSMA) were investigated. Regression analysis and modified grey model (MGM) were used to construct the prediction models for properties of modified mixtures. CRSMA, CR and diatomite modified SMA (CRDSMA), and CR and SBS modified SMA (CRSSMA) were prepared in laboratory, respectively. Process of F-T cycles was designed. Air void, indirect tensile strength (ITS), and indirect tensile stiffness modulus (ITSM) were measured to evaluate the antifreezing performances of CRSMA, CRDSMA, and CRSSMA. Results indicate that air voids increase with the increasing of F-T cycles. ITS and ITSM all decrease with the increasing of F-T cycles. The addition of diatomite and SBS can reduce the air void and improve the ITS and ITSM of CRSMA. CRSSMA presents the lowest air void, highest tensile strength, and largest stiffness modulus, which reveals that CRSSMA has the best F-T resistance among three different kinds of mixtures. Moreover, MGM (1, 2) models present more favorable accuracy in prediction of air void and ITS compared with regression ones.

Sign in / Sign up

Export Citation Format

Share Document