The Properties of Compound Modified Asphalt Emulsion Mortar

2012 ◽  
Vol 531 ◽  
pp. 252-255
Author(s):  
Zhong Wen Ou ◽  
Yi Zhang ◽  
Zi Long Zhao ◽  
Jian Min Ren ◽  
Shang Yong Zhou ◽  
...  
Keyword(s):  
Bond Strength ◽  
Epoxy Resin ◽  
Shear Bond Strength ◽  
Cement Content ◽  
Asphalt Emulsion ◽  
Modified Asphalt ◽  
New Type ◽  
Emulsified Asphalt ◽  
Asphalt Mortar ◽  
Better Than

A new type modified asphalt emulsion mortar is studied in order to find out the most favorable materials for the recycling of decorative stone. Through some experiments, by comparing the cement and water-epoxy resin emulsion mixed separately or together on the performances of emulsified asphalt mortar, the result shows that cement content 30% and water-epoxy resin emulsion content 30% mixing together is better than mixing separately. Besides, the paper has made a systematic study on the comprehensive performance, the result shows that with excellent performances, the modified asphalt emulsion mortar which can replace cement mortar meets the demands of the relative criterions. When the temperature reaches 140°C, both the tensile bond strength and the shear bond strength decrease to 0.1 MPa. So it is feasible to recycle the decorative stone.

The Preparation of Compound Modified and Emulsified Asphalt Mortar and its Micro-Analysis

2012 ◽  
Vol 531 ◽  
pp. 248-251 ◽  
Author(s):  
Zhong Wen Ou ◽  
Shang Yong Zhou ◽  
Zi Long Zhao ◽  
Jian Min Ren ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Bond Strength ◽  
Epoxy Resin ◽  
Shear Bond Strength ◽  
Cement Mortar ◽  
Cement Content ◽  
Modified Asphalt ◽  
Water Based ◽  
Emulsified Asphalt ◽  
Micro Analysis ◽  
Asphalt Mortar

The modification effects of the cement and the water-based epoxy resin on the asphalt emulsified mortar are studied. The result shows that with the cement content 30% and water-epoxy resin emulsified content 30%, the modified asphalt emulsified mortar which can replace cement mortar meets the demands of the relative criterions. When the temperature reaches 140°C, both the tensile bond strength and the shear bond strength decrease to 0.1 MPa. So it is feasible to recycle the decorative stone .The micro-analysis of the modified mortar are investigated by using IR and TGA-DTA, and its modification mechanism is also discussed.

Study on SBS Modified Asphalt Emulsion and Aggregate Adhesion of CA Mortar

2011 ◽  
Vol 413 ◽  
pp. 467-471 ◽  
Author(s):  
Bao Ju Liu ◽  
Shao Ying Ning ◽  
Yuan Xia Yang
Keyword(s):  
Zeta Potential ◽  
Isoelectric Point ◽  
Asphalt Emulsion ◽  
Absolute Value ◽  
Modified Asphalt ◽  
Emulsified Asphalt ◽  
Sbs Modified Asphalt ◽  
Influence Of Ph ◽  
Ca Mortar ◽  
Better Than

The influence of pH of emulsified asphalt, the kinds and content of emulsifiers and stabilizers on asphalt-aggregate adhesion have been investigated in this paper. Results show that the pH of the emulsified asphalt has great impact on asphalt-aggregate adhesion by way of the effect of pH on asphalt, asphalt-aggregate adhesion is worst when asphalt emulsion at pH≈4, which is close to the isoelectric point of asphalt, the bigger the zeta potential absolute value of emulsified asphalt, the better the asphalt-aggregate adhesion property. Effect of emulsifiers on asphalt-aggregate adhesion is complex, the best dosage is at 0.2%. The addition of organic stabilizers are superior to inorganic stabilizers to improve the asphalt-aggregate adhesion, the best dosage is at 0.4%. Effect of mixing emulsifier and stabilizer is better than single-doped emulsifier and stabilizer.

Research of In Situ Polymerization and Core-Shell Structure Modified Emulsified Asphalt

2011 ◽  
Vol 71-78 ◽  
pp. 928-931
Author(s):  
Jin Liang Wu ◽  
Yong Xing Zhang ◽  
Chun Sun Zhang
Keyword(s):  
Shell Structure ◽  
In Situ Polymerization ◽  
Core Shell ◽  
Asphalt Emulsion ◽  
Sound Effect ◽  
Structure And Property ◽  
Modified Asphalt ◽  
Core Shell Structure ◽  
Emulsified Asphalt

Nowadays, there are dominantly two ways of producing modified emulsified asphalt ,one of which is to emulsify modified asphalt, the other to modify asphalt emulsion. But they have the same defect that modifier cannot be evenly mixed with asphalt emulsion, which has side effect on the performance of modified emulsified asphalt. The emulsified asphalt and modifier have different traits in structure and property. In order to make the modifier disperse in asphalt emulsion evenly to improve the performance of modified emulsified asphalt, a tentative idea is brought forward: we shall utilize in-situ polymerization and core-shell structure to enhance feature of emulsified asphalt. Core-shell structure is a method of synthesizing composite material, which can assist to achieve sound effect of the two kinds of materials. The point to emphasize is, in this paper, the introduction and feasibility of the method, its specialty against current mainly methods, the difficulties encountered in practice as well as its promising prospect and the anticipated target to achieve will all be illustrated.

scholarly journals Adhesion between Epoxy Resin-Based Fiber Post and Dental Core Resin Improved by Non-Thermal Atmospheric Pressure Plasma

2020 ◽  
Vol 10 (7) ◽  
pp. 2535
Author(s):  
Hyoung-Sik Kim ◽  
Song-Yi Yang ◽  
Eun Ha Choi ◽  
Kwang-Mahn Kim ◽  
Jae-Sung Kwon
Keyword(s):  
Contact Angle ◽  
Bond Strength ◽  
Epoxy Resin ◽  
Atmospheric Pressure ◽  
Shear Bond Strength ◽  
Treatment Time ◽  
Atmospheric Pressure Plasma ◽  
Fiber Post ◽  
Pressure Plasma ◽  
Push Out

The purpose of the study was to evaluate the adhesion between dental core resin and epoxy resin-based fiber post after treatment with non-thermal atmospheric pressure plasma (NTAPP) and compare with conventional methods of epoxy resin-based fiber post treatments. Contact angle was measured on the surface of epoxy resin before and after NTAPP treatment and X-ray photoelectron spectroscopy was used to analyze the surface chemistry. Finally, two shear bond strength tests were carried out; shear bond strength between core resin and epoxy resin for comparison between NTAPP treated and untreated sample, and push-out shear bond strength between core resin and NTAPP treated commercially available epoxy resin-based fiber post for comparison between NTAPP treated samples with conventionally treated samples. Contact angle on the surface of epoxy resin generally decreased with increasing NTAPP treatment time with presence of surface chemical changes. Also, there was significantly higher shear bond strength and push-out shear bond strength between epoxy resin and core resin for NTAPP treated epoxy resin, even to the conventionally treated epoxy resin-based fiber post with hydrofluoric acid or silane. In conclusion, new technology of NTAPP has potential for application on the epoxy resin-based fiber post to improve endodontic restoration success rate.

Experimental Investigation of the Influence of the Bond Conditions on the Shear Bond Strength between Steel and Self-Compacting Concrete Using Push-Out Tests

2012 ◽  
Vol 525-526 ◽  
pp. 205-208 ◽  
Author(s):  
Peter Helincks ◽  
Wouter de Corte ◽  
Jan Klusák ◽  
Veerle Boel ◽  
Geert de Schutter
Keyword(s):  
Bond Strength ◽  
Epoxy Resin ◽  
Shear Bond Strength ◽  
High Performance Concrete ◽  
Adhesive Layer ◽  
Crushed Stone ◽  
Stress Concentrations ◽  
Concrete Core ◽  
Significant Difference ◽  
Push Out

Steel-concrete joints are often provided with welded shear studs. However, stress concentrations are induced in the structure due to the welding. Moreover, a reduction in toughness and ductility of the steel and a decreased fatigue endurance of the construction is observed. In this paper the shear bond strength between steel and ultra-high performance concrete (UHPC) without mechanical shear connectors is evaluated through push-out tests. The test samples consist of two sandblasted steel plates with a thickness of 10 mm and a concrete core. The connection between steel and concrete is obtained by a 2-component epoxy resin. Test samples with a smooth adhesive layer are compared with those with an epoxy layer, which is applied with a toothed paddle and/or gritted with small aggregates. In this research, specimens prepared with river gravel, crushed stone, and steel grit are compared and also two different epoxy resins are used. During the tests, the ultimate shear force is recorded as well as the slip between steel and concrete. All test specimens exhibited a concrete-adhesive or concrete failure. Furthermore, test results show that the use of a more fluid epoxy resin improves the anchorage of the gritted aggregates in the adhesive layer, resulting in higher shear bond stresses. No significant difference is found between specimens, gritted with river gravel or crushed stone. Applying the adhesive layer with the toothed paddle in horizontal direction slightly improves the bond behaviour. Finally, the experimental results of the test members with a smooth epoxy layer without gritted aggregates, provide test data for a fracture mechanics approach, which uses a 2D numerical model of the test specimen, composed of steel, epoxy resin, and concrete.

Effect of Emulsified Asphalt on Temperature Susceptibility of Cement Asphalt Mortar

2011 ◽  
Vol 335-336 ◽  
pp. 124-127 ◽  
Author(s):  
Yun Hua Zhang ◽  
Fa Zhou Wang
Keyword(s):  
Asphalt Emulsion ◽  
Thermal Dependence ◽  
Temperature Range ◽  
Cement Asphalt Mortar ◽  
Different Temperatures ◽  
Lower Temperature ◽  
Emulsified Asphalt ◽  
Temperature Susceptibility ◽  
Ca Mortar ◽  
Asphalt Mortar

Cement asphalt mortar (CA mortar, or CAM) is a composite material with equal presence of cement and asphalt emulsion and acts as a cushion layer in the structure of slab track. In the hardened matrix, asphalt accounts for about 30 vol. %, rendering the properties of CA mortar susceptible to temperature variation. In the paper, different kinds of emulsified asphalts (A70 emulsified asphalt, A90 emulsified asphalt, SBS modified emulsified asphalt and SBR modified emulsified asphalt) for CA mortar and the compressive strengths of CA mortar under different temperatures (-18°C, 10°C, 25°C, 40°C and 60°C) were studied to reflect its thermal dependence. Results indicate that temperature susceptibility of CA mortar prepared with modified emulsified asphalt is better than which prepared with unmodified emulsified asphalt. SBS modified emulsified asphalt -CAM (viz. CA mortar prepared by SBS modified emulsified asphalt) is alleviated at the whole temperature range, while that of SBR modified emulsified asphalt -CAM is improved primarily at the lower temperature region. As for types of unmodified asphalts, A90 emulsified asphalt -CAM outperforms A70 emulsified asphalt -CAM at lower temperature range.

Research on Hardening Mechanism of Cement-Emulsified Asphalt-Epoxy Resin

2012 ◽  
Vol 430-432 ◽  
pp. 434-437 ◽  
Author(s):  
Fan Shen ◽  
Shao Long Huang ◽  
Zheng Sun ◽  
Qing Jun Ding
Keyword(s):  
Epoxy Resin ◽  
Basic Structure ◽  
Heat Of Hydration ◽  
Asphalt Emulsion ◽  
Hardening Mechanism ◽  
Waterborne Epoxy ◽  
Endothermic Reactions ◽  
Hardening Mechanisms ◽  
Waterborne Epoxy Resin ◽  
Emulsified Asphalt

This article researched the cementation and hardening mechanisms of cement asphalt emulsion and waterborne epoxy mortar by using the XRD, and heat of hydration testing methods. The results of this study show that the mixture of cement with epoxy and cement- asphalt-epoxy are endothermic reaction. There are occurring endothermic reactions between cement with epoxy. The waterborne epoxy resin and basic structure unit of ettringite [Ca3Al(OH)6•12H2O] were reacted and formed Ca-complex at earlier period of hydration.

Shear Bond Strength of Ceramic Brackets with Chemical or Mechanical Retention

1992 ◽  
Vol 19 (3) ◽  
pp. 183-189 ◽  
Author(s):  
Carl-Magnus Forsberg ◽  
Catharina Hagberg
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Bond Failure ◽  
Ceramic Brackets ◽  
New Type ◽  
Bond Strengths ◽  
Ceramic Bracket ◽  
Chemical Retention ◽  
Large Groups ◽  
Very High

The study was undertaken to measure and compare the shear bond strengths of a ceramic bracket with chemical retention, a ceramic bracket with a new type of textured base providing mechanical retention, and a metal bracket with foil-mesh base. The tests were performed on 51 extracted human premolars which were randomly divided into three equally large groups (n = 17)—one group for each type of bracket. After debonding, the site of failure was noted and the enamel surface inspected with scanning electron microscopy. The ceramic bracket with chemical retention exhibited significantly higher bond strength than the corresponding bracket with textured base. In comparison with the metal bracket significantly higher bond strengths were recorded for both types of ceramic brackets. The ceramic bracket with mechanical retention and the metal bracket were comparable as regards the site of bond failure. In some cases the chemical bond provided very high values of bond strength. Enamel failure were recorded in three teeth which had been bonded with this type of ceramic bracket.

scholarly journals Effects of phase-inversion waterborne epoxy resin on properties of cold patch waterborne epoxy emulsified asphalt

2020 ◽  
Vol 27 (1) ◽  
Author(s):  
Boming Tang ◽  
Yu Gu ◽  
Jianming Ling ◽  
Lihong He ◽  
Fan Yang
Keyword(s):  
Shear Strength ◽  
Bond Strength ◽  
Epoxy Resin ◽  
Phase Inversion ◽  
Resin Content ◽  
Inversion Method ◽  
Strength Increase ◽  
Waterborne Epoxy ◽  
Waterborne Epoxy Resin ◽  
Emulsified Asphalt

In order to evaluate effects of waterborne epoxy resin prepared by the phase-inversion method (phase-inversion waterborne epoxy resin) on properties of waterborne epoxy emulsified asphalt for cold patch engineering of asphalt pavement, a series of methods for evaluating properties of emulsified asphalt and casting resin were used. Results show that, with an increase in waterborne epoxy resin content, penetration, ductility, surface curing time of waterborne epoxy emulsified asphalt decrease and its adhesion degree, shear strength and bond strength increase. Moreover, its penetration, ductility and adhesion degree remain unchanged when the content of waterborne epoxy resin exceeds 20%, and its shear strength and bond strength increase most remarkably when the content of waterborne epoxy resin increases from 10% to 20%. The test results are explained by the surface fluorescent micromorphology of cured waterborne epoxy emulsified asphalt that, with the increase in waterborne epoxy resin content, epoxy resin particles firstly appear as segregated spots, and then change from spotted status to clustered status, and the epoxy resin phase gradually becomes a continuous phase. In conclusion, phase-inversion waterborne epoxy resin has effects on properties of the cold patch waterborne epoxy emulsified asphalt, and recommended content of waterborne epoxy resin is 20%.

Study the Influence of Soap Solution’s pH Value on the Modified Asphalt Emulsion Performance

2012 ◽  
Vol 253-255 ◽  
pp. 312-316 ◽  
Author(s):  
Jing Jing Xiao ◽  
Wei Jiang
Keyword(s):  
Soap Solution ◽  
Ph Value ◽  
External Factors ◽  
Solution Stability ◽  
Production Technique ◽  
Asphalt Emulsion ◽  
Modified Asphalt ◽  
New Type

Modified asphalt emulsion，which worked as a new type of freeway maintenance material, have attracted much attention since it be exploited. The emulsion’s properties were easily effected by external factors, such as production technique, the pH value of soap solution, stability additive, emulsifier, modifier and so on. On the basis of indoor tests, this paper researched the pH value’s influence on the performance of modified asphalt emulsion emphatically.

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