Shrinkage characteristics of heat-treated ultra-high performance concrete and its mitigation using superabsorbent polymer based internal curing method

Kang, Sung-Hoon; Hong, Seong Hyeon; Moon, Juhyuk

doi:10.1016/j.cemconcomp.2018.03.003

Cited by 89 publications

(34 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hydration heat emitted from 15 g of paste was measured using an isothermal calorimeter (TAM AIR, TA Instruments, New Castle, DE, USA) for the first three days; here, as presented in Table 2, the different curing temperatures were subjected to the samples, following previous studies [24,32]. The measured heat flow and cumulative heat were normalized by the weight of the cementing materials in each paste sample.…”

Section: Hydration Reaction and Porosity Analysismentioning

confidence: 99%

“…Shrinkage behavior of the mortars was examined for 91 days, following the method of the previous studies [32,34]. For this, a dumbbell-shaped strain gauge (PMF series, Tokyo Sokki Kenkyujo Co., Ltd., Tokyo, Japan) was embedded in the center of the specimen (40 mm × 40 mm × 160 mm) longitudinally, and connected to a data logger (TDS-530, Tokyo Sokki Kenkyujo Co., Ltd.).…”

Section: Shrinkage and Weight Lossmentioning

confidence: 99%

“…To measure the autogenous shrinkage, the evaporation of the mortar specimens was prevented using adhesive aluminum tape right after demolding, while the total shrinkage was measured using the specimens exposed to the dry air (20 • C and RH 60%). The drying shrinkage was determined by subtracting the autogenous shrinkage from the total shrinkage [32,35]. In addition, using the same size of specimens (40 mm × 40 mm × 160 mm), the weight changes were measured during the same period, with a time interval of one day.…”

Section: Shrinkage and Weight Lossmentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of Material Properties of Lime-Activated Slag Mortar from Intensified Pozzolanic Reaction and Pore Filling Effect

et al. 2018

Self Cite

View full text Add to dashboard Cite

To utilize alkali-activated materials widely, this study investigates the effects of an intensified pozzolanic reaction and pore filling by silica fume on various material properties of lime-activated slag mortar. Although ground-granulated blast-furnace slag is classified as a cementitious material, it commonly requires an activator to enhance the performance of structural materials. In the first step of the improvement strategy, slag reaction is activated by hydrated lime. Next, silica fume is added to densify the microstructure by the physical pore filling effect and/or the pozzolanic reaction that additionally forms hydration products. This increased the compressive strength by 18% at 28 days and by 25% at 91 days under ambient curing condition, mainly due to the physical effect. Moreover, elevated temperature curing for three days was highly effective to further improve the strength, and to accelerate strength development. This is because both the physical effect and the chemical reaction are effective at the high temperature curing condition. The conducted microstructural investigation provided the evidence for the intensified pozzolanic reaction and pore filling effect, both of which are closely related to the mechanical properties. It is also found that the use of silica fume positively contributes to the dimensional stability. Since the developed material exhibits high strength (>40 MPa after 14 days) without Portland cement or highly toxic chemicals, it can be practically used as an eco-friendly structural mortar.

show abstract

Section: Hydration Reaction and Porosity Analysismentioning

confidence: 99%

Section: Shrinkage and Weight Lossmentioning

confidence: 99%

Section: Shrinkage and Weight Lossmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of Material Properties of Lime-Activated Slag Mortar from Intensified Pozzolanic Reaction and Pore Filling Effect

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…A well-designed concrete is deemed to be water tight and has discontinuous pores and microstructure. Conversely, when concrete is subjected to severe loading and weathering, the physical and chemical process of deterioration like cracking begins to manifest [26]. The prolonged permeability as a result of cracking permits more water and other hostile attacking chemicals like chloride, Sulphur, and carbonate to infiltrate into concrete, which further deteriorates concrete.…”

Section: • Lower Permeability and Evaporationmentioning

confidence: 99%

“…This reaction leads to the formation of new silicate and aluminate hydrated phases, which start to precipitate from the solution of the existing grains furthering the dissolution of the anhydrous phase through different processes [34]. Kang et al [26] assert that the addition of the internal curing agent like SAP in HPC increase the rate of hydration in cementitious matrix. In an attempt to investigate hydration processes in HPC, Kim and Lee [35] studied the hydration kinetics of high-strength concrete with bottom ash as an internal curing agent.…”

Section: • Cement Hydration and Microstructure Of Cementitious Pastementioning

confidence: 99%

Awareness and Benefits of Self-Curing Concrete in Construction Projects: Builders and Civil Engineers Perceptions

et al. 2018

View full text Add to dashboard Cite

Self-cured concrete is a type of concrete with a special ability to reduce autogenous shrinkage responsible for early-stage cracking. It is useful generally for the construction of high rise buildings and bridges. The application and use of this technique of curing concrete, however, depends on the level of awareness among stakeholders regarding the application of the technique and its benefits among other factors. This study, therefore, sets out to investigate the level of awareness of selected construction professionals regarding the self-curing concrete technique in addition to the benefits. A cross-sectional survey design method was embraced by giving out 115 questionnaires to builders and engineers in Lagos who were purposely selected. The data was subjected to descriptive statistics. The results indicate that about 21% of selected builders and civil engineers practicing in Lagos are not aware and familiar with the concept of self-curing technology while about 43.1% of the professionals who have the knowledge of SCT have never used it in their professional practice. In addition, lower permeability, reduced coefficients of thermal expansion, and improved microstructures of cementitious paste were perceived as the dominant benefits of the self-curing concrete method. The implication of this study to construction professionals in Nigeria is in developing capacities on innovation practices in high-strength concrete technologies that will make them strike a balance with international counterparts.

show abstract

Experimental analysis of influence factors on pavement concrete performance: Different content of stone powder in manufactured sand

Chen

2020

Mat Design & Process Comms

View full text Add to dashboard Cite

At present, due to the unclear understanding of the mixed proportion of stone powder in the manufactured sand, the quality of finished concrete is affected. In this study, the concrete was mixed with manufactured sand containing 0%, 5%, 10%, and 15% stone powder and poured into standard models. The compressive strength of the concrete was obtained by measuring the pressure; the dry shrinkage rate of the concrete was obtained by measuring the volume; the impermeability was evaluated by the seepage height method. The results demonstrated that the increase of stone powder content resulted in the enhancement of concrete compressive strength and impermeability, but blindly adding stone powder led to the deterioration of concrete anti‐shrinkage performance. Finally, the comparison of the overall experimental data showed that 10% of stone powder could make all aspects of the performance of the concrete optimal.

show abstract

Shrinkage characteristics of heat-treated ultra-high performance concrete and its mitigation using superabsorbent polymer based internal curing method

Cited by 89 publications

References 49 publications

Enhancement of Material Properties of Lime-Activated Slag Mortar from Intensified Pozzolanic Reaction and Pore Filling Effect

Enhancement of Material Properties of Lime-Activated Slag Mortar from Intensified Pozzolanic Reaction and Pore Filling Effect

Awareness and Benefits of Self-Curing Concrete in Construction Projects: Builders and Civil Engineers Perceptions

Experimental analysis of influence factors on pavement concrete performance: Different content of stone powder in manufactured sand

Contact Info

Product

Resources

About