Bond strength of PCC pavement repairs using metakaolin-based geopolymer mortar

Alanazi, Hani; Yang, Mijia; Zhang, Dalu; Gao, Zhili

doi:10.1016/j.cemconcomp.2015.10.009

Cited by 105 publications

(34 citation statements)

References 20 publications

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“…One of the most important properties of the repair material is the bond strength between the concrete substrate and repair materials. In order to increase the bond strength, many researchers (Springkel and Ozyildirim, 2000;Alanazi et al, 2016;Rith et al, 2016) have developed individual bond strength criteria by using the tensile strength. For example, Phoongernkham et al (2016b) has applied the bond strength criterion to discuss the bond strength quality of notched concrete beam filled with AAB made from low calcium fly ash-ground granulated blast furnace slag blends under different types of alkali solutions.…”

Section: Bond Strength Quality By the Interfacial Bond Strength Testmentioning

confidence: 99%

“…Note that true bond strength occurred in the bond interface between two materials. While, failures at other locations have greater than the failure load whose high bond strength is essential for practical applications (Springkel and Ozyildirim, 2000;Alanazi et al, 2016). In this study, the bond strength quality was classified based on the five bond strength criteria used in literature (Springkel and Ozyildirim, 2000;Alanazi et al, 2016;Phoo-ngernkham et al, 2016b), whose conditions were obtained from compressive strength improvement from slant shear prism tests.…”

Section: Bond Strength Quality By the Interfacial Bond Strength Testmentioning

confidence: 99%

“…Moreover, alkali-activated binders have also been used as pavement repair materials (Hawa et al, 2013;Alanazi et al, 2016;Duan et al, 2016a). For the use of alkali-activated binders as repair and reinforcement of damaged notched concrete beam, Phoo-ngernkham et al (2016b) reported that the flexural strength of notched concrete beam filled with the alkali-activated binder made from low calcium fly ash plus granulated blast furnace slag activated with alkali solutions was similar to most commercial repair materials.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adhesion characterisation of Portland cement concrete and alkali-activated binders

Phoo-ngernkham

Hanjitsuwan

et al. 2019

Advances in Cement Research

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In this paper, alkali-activated binders (AAB) are investigated for their potential use as repair materials of Portland cement concrete (PCC). The adhesion characterization of PCC and repair materials using AAB made from fly ash (FA) and Portland cement (PC) activated with sodium hydroxide and sodium silicate solutions, AAB made from FA and calcium hydroxide (CH) activated with sodium hydroxide and sodium silicate solutions, and commercial repair material (RMs) have been investigated. Test results show that the AAB 2 with additives gives high bond strength which is similar to the use of RMs. Bond strength between PCC substrate and AAB with additives are improved, due to increased reaction products especially C-S-H gel. However, the CH replacement at 15% shows a large amount of calcite resulting in reduction in bond strength. The failure patterns and fracture interface images of the tested specimens also demonstrate the quality of the developed bond strength. It was shown that the interface zone of PCC substrate and AAB is homogeneous with no visible gap between the two bonding surfaces. It is suggested that the AAB with PC as additive can be used as a repair binding material which not only has high bond strength but also is cost-effective.

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Section: Bond Strength Quality By the Interfacial Bond Strength Testmentioning

confidence: 99%

Section: Bond Strength Quality By the Interfacial Bond Strength Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adhesion characterisation of Portland cement concrete and alkali-activated binders

Phoo-ngernkham

Hanjitsuwan

et al. 2019

Advances in Cement Research

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“…Therefore, the rapid repair of the deteriorated pavement is essential to eliminate the traffic congestion, traffic accidents, and environmental pollution caused by the poor road conditions. In recent years, people have developed many materials for concrete pavement repair, which can be divided into three categories: cement-based materials, polymer-modified cement-based materials, and polymer or resin materials [2][3][4][5]. In this study, a sulfoaluminate cement mortar was used as a repair material, due to its characteristics of rapid hardening, high early strength, high corrosion resistance, high impermeability and low dry shrinkage.…”

Section: Introductionmentioning

confidence: 99%

The Bond Strength of a Calcium Sulfoaluminate Cement-Based Repair Mortar

Li¹

2019

Ceramics - Silikaty

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This study investigated the interfacial bond strength between a calcium sulfoaluminate cement (CSA) mortar as a repair material and an old substrate. The surface of the old substrate was treated to have a different roughness (smooth, slightly rough and seriously rough) and moisture. In addition, the effect of a polycarboxylate superplasticiser on the bond properties of the CSA mortar was also studied. The results show that the interface between the CSA mortar and the old substrate is a weak area, and all the test specimens break at the interface. As the interface roughness increases, the bond strength at 4h increases from 1.0 MPa to 3.1 MPa, indicating that the higher interface roughness is beneficial in improving the bond strength. The wet interface has a lower bond strength than the dry interface. Adding an appropriate amount of polycarboxylate superplasticiser is beneficial to improving the bond strength of the mortar. When the polycarboxylate superplasticiser dosage is 0.9 %, the bond strength is the highest.

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“…Understanding and analyzing the origin of its heterogeneity is the subject of microstructural evolution with regard to the context of phase transformation of concrete within the IZ. Knowledge of this evolution, together with the short-term and long-term performance of the water-to-cement ratio of the overlays during hardening, is essential and remains a challenging task [8][9][10][11][12]. As mentioned in [13,14], the material within the IZ between the overlay and existing substrate usually has a different aggregate/cement content, w/c ratio, and temperature during the hardening period.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution within the Interphase between Hardening Overlay and Existing Concrete Substrates

Sadowski

Stefaniuk

2017

Applied Sciences

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This article presents the microstructural evolution within the interphase between a hardening overlay made of cement mortar and an existing concrete substrate. The substrate has been treated using four methods, due to which different surfaces were obtained: a raw surface, a surface formed after contact with the formwork, a grinded surface, and a shotblasted surface. Special focus is placed on the results of the microporosity within the interphase zone (IZ) using X-ray micro computed tomography (micro-CT). The microporosity profiles obtained from the micro-CT images have been used to assess the nature of the IZ between the hardening overlay and the existing concrete substrate. It has been shown that microporosity and the number of pores in the concrete within the IZ increases during the hardening time of an overlay made of cement mortar. It also depends on the applied surface treatment method. However, no significant changes in the microporosity of the existing concrete substrate have been noted.

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Bond strength of PCC pavement repairs using metakaolin-based geopolymer mortar

Cited by 105 publications

References 20 publications

Adhesion characterisation of Portland cement concrete and alkali-activated binders

Adhesion characterisation of Portland cement concrete and alkali-activated binders

The Bond Strength of a Calcium Sulfoaluminate Cement-Based Repair Mortar

Microstructural Evolution within the Interphase between Hardening Overlay and Existing Concrete Substrates

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