Effects of cement contents on the performance of cement asphalt emulsion mixtures with rapidly developed early-age strength

Tian, Ye; Lu, Dong; Ma, Ronghui; Zhang, Jun; Li, Weiguang; Yan, Xiaohui

doi:10.1016/j.conbuildmat.2020.118365

Cited by 27 publications

(6 citation statements)

References 25 publications

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“…This was mostly due to the use of GGBFS and CCR that were activated by the waste alkaline Ca(OH) 2 solution, which produced many hydration products that increased the strength and stiffness of the GCAE. These findings align with the research conducted by Tian et al 65 , which demonstrated improved water susceptibility when incorporating a high content of cement in CAEMs. The advantage of introducing GGBFS, CCR, and the waste alkaline Ca(OH) 2 solution increased the formation of hydration products and enhanced water susceptibility.…”

Section: Resultssupporting

confidence: 92%

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Dulaimi,

Al Busaltan,

Mydin

et al. 2023

Sci Rep

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In recent years, there has been a growing interest in cold asphalt emulsion mixture (CAEM) due to its numerous advantages, including reduced CO2 emissions, energy savings, and improved safety during construction and application. However, CAEM has often been considered inferior to hot mix asphalt (HMA) in terms of performance. To address this issue and achieve desirable performance characteristics, researchers have been exploring the modification of CAEM using high-cost additives like ordinary Portland cement. In this study, the focus was on investigating the effects of utilizing waste alkaline Ca(OH)2 solution, ground granulated blast-furnace slag (GGBFS), and calcium carbide residue (CCR) as modifiers to enhance the properties of CAEM. The aim was to develop an innovative geopolymer geopolymer-based cold asphalt emulsion mixture (GCAE). The results of the study revealed that the use of waste alkaline Ca(OH)2 solution led to an increase in early hydration, which was confirmed through scanning electron microscopy. Furthermore, the experimental findings demonstrated that waste alkaline Ca(OH)2 solution significantly contributed to the rapid development of early-age strength in GCAE. As a result, GCAE showed great potential for utilization in pavement applications, particularly for roads subjected to harsh service conditions involving moisture and temperature. By exploring these alternative modifiers, the study highlights a promising avenue for enhancing the performance of CAEM and potentially reducing the reliance on expensive additives like ordinary Portland cement. The development of GCAE has the potential to offer improved performance and durability in pavement applications, thus contributing to sustainable and efficient road infrastructure.

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Section: Resultssupporting

confidence: 92%

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Dulaimi,

Al Busaltan,

Mydin

et al. 2023

Sci Rep

Self Cite

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“…Weaker diffraction peaks of alite (C 2 S) and belite (C 3 S) were observed in samples C85ITP15. This observation confirmed that adding ITP promoted the hydration of alite and belite and helped to the formation of more hydration products [ 33 ]. These results are following the findings of Han et al [ 16 ].…”

Section: Resultssupporting

confidence: 66%

Effects of Curing Conditions on the MECHANICAL and Microstructural Properties of Ultra-High-Performance Concrete (UHPC) Incorporating Iron Tailing Powder

Zhong

Yan

et al. 2021

Materials

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It has been reported that iron tailing powder (ITP) has the potential to partially replace cement to prepare ultra-high-performance concrete (UHPC). However, the reactivity of ITP particles in concrete largely depends on the curing method. This study investigates the effects of curing conditions on the mechanical and microstructural properties of UHPC containing ITP. To achieve this objective, three research tasks are conducted, including (1) preparing seven concrete formulations by introducing ITP; (2) characterizing their mechanical performance under different curing regimes; and (3) analyzing their microstructure by XRD patterns, FTIR analysis, and SEM observation. The experimental results show that there is an optimum ITP dosage (15%) for their application. The concrete with 15% ITP under standard curing obtains 94.3 MPa at 7 days, their early-age strength could be even further increased by ~30% (warm-water curing) and ~35% (steamed curing). The steam curing regime stimulates the activity of ITP and refines the microstructure. This study demonstrates the potential of replacing Portland cement with ITP in UHPC production.

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“…6c), which was mainly due to the overdose of cement content (6 wt%) which consumed too much free water, resulting in the poor workability for the mixture. Additionally, some cement grains failed to participate in the hydration process and form micropores/voids [35].…”

Section: Frost Damagementioning

confidence: 99%

Cementitious Fillers in Cement Asphalt Emulsion Mixtures: Long-Term Performance and Microstructure

et al. 2021

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Cement has been well documented to positively affect the early-age strength of the cement asphalt emulsion mixtures (termed as CAEM) without compromising workability. However, the long-term performance of the CAEM incorporating multiple cement combinations is not conclusive. This study explored the effect of the combined usage of ordinary portland cement (OPC) and sulfoaluminate cement (SAC) on the long-term performance and microstructural properties of a CAEM system in detail. Three tasks were conducted, including (1) designing six CAEM formulations by introducing different types (OPC and SAC) and contents (2-6 wt%) of cement; (2) evaluating the long-term performance by moisture susceptibility, frost damage, abrasion resistance, and rutting resistance; and (3) characterizing the microstructural properties by scanning electron microscopes and energy-dispersive spectrometers. The experimental results revealed that the relative dynamic elastic modulus of CAEM was increased to 69.7% when admixing 90 wt% OPC and 10 wt% SAC. The mixture incorporating 90 wt% OPC and 10 wt% SAC demonstrated excellent rutting resistance up to ~31,000 cycles/mm of dynamic stability. The improved long-term performance actually originated from the reduced voids and produced a dense microstructure. The outcomes could facilitate tailoring CEAM products with better long-term performance.

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Effects of cement contents on the performance of cement asphalt emulsion mixtures with rapidly developed early-age strength

Cited by 27 publications

References 25 publications

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Innovative geopolymer-based cold asphalt emulsion mixture as eco-friendly material

Effects of Curing Conditions on the MECHANICAL and Microstructural Properties of Ultra-High-Performance Concrete (UHPC) Incorporating Iron Tailing Powder

Cementitious Fillers in Cement Asphalt Emulsion Mixtures: Long-Term Performance and Microstructure

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