Durability characteristics of self-consolidating concrete designated for repair applications

Hwang, Soo-Duck; Khayat, Kamal H.

doi:10.1617/s11527-008-9362-1

Cited by 25 publications

(15 citation statements)

References 8 publications

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“…The critical pore size is the most frequently occurring pore size in interconnected pores that allows maximum percolation, corresponding to the steepest slope of the cumulative curve. The threshold diameter is the narrowest path in the interconnected pores, below which commences the great portion of intrusion, corresponding to the sudden inflection point in the injection curve (Hwang and Khayat 2009). In the differential curves of MIP, several peaks corresponding to the pores of varied sizes usually can be observed.…”

Section: Pore Structure Of Hcpsmentioning

confidence: 99%

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Zhang

Kong

2014

ACT

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The influences of polycarboxylate (PCE) superplasticizer on pore structure of hardened cement pastes (HCPs) and impermeability of hardened mortars were investigated. Cement pastes and mortars with different water to cement ratios (W/Cs) and varied superplasticizer dosages were prepared and cured for 7 days and 28 days respectively. Mercury intrusion porosimetry and alternating current impedance (ACI) were employed to characterize the pore structure of HCPs and the impermeability of hardened mortars. Results show that PCE significantly affects the pore structure of HCPs due to its impacts on the dispersion of cement grains in fresh cement pastes. The effects of superplasticizer on the pore structure are associated with W/C and curing age of cement pastes. At W/C of 0.29, increasing superplasticizer dosage results in obvious declines in total pore volume at early ages and reduces pore connectivity. By contrast, increases in total pore volume and higher pore connectivity are found when PCE is incorporated in the paste at W/C of 0.4. ACI reveals that the inclusion of PCE brings about a denser structure and enhanced impermeability of hardened mortars. It is believed that the enhanced impermeability is related to the reduced interfacial heterogeneity and the compacted interfacial zone when PCE is added.

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Section: Pore Structure Of Hcpsmentioning

confidence: 99%

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Zhang

Kong

2014

ACT

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“…RSM) might well be attractive in this scenario. It is worthy to note that DOE is commonly applied to design of concrete mixture [78][79][80].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Mechanical Properties of Frozen Soils Using Response Surface Method: An Optimization Approach

Vahdani

Ghazavi

Roustaei

2020

IJE

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The present study was based on a promoting statistical method known as response surface method (RSM). RSM has been applied as an efficient method to optimize many physical applications in industry for more than two decades. In the current study, the RSM was utilized as a platform to develop models as a function of some prescribed input factors to predict mechanical properties (responses) of frozen soils (i.e. peak tensile/compressive strength, elasticity modulus). Besides, RSM makes it possible to find significant factors and probable interactions as well. A widespread literature review was conducted and three case studies were chosen to evaluate the performance of the RSM in developing precise models and finally an optimum experiment. For each case study, less than half of the available data (an average of 40.8%) was employed to develop models and the remaining part was employed to evaluate the validity of derived models. A comparison between predicted and measured data showed a good agreement with a significant level of 0.05. This indicates that upon using the model a hundred times to predict an specific property for different input factors, the maximum five predictions may diverge from the measured values with ± confidence interval. In addition, some contours were plotted to give a comprehensive presentation of any probable correlations between investigated properties and input factors. Based on the developed models with an average correlation coefficients (R 2) of 93.69, temperature was found to be the most significant factor affecting the mechanical properties of frozen fine soil, while the dry density was not as effective as the temperature.

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“…In short, a SCC should be characterized by high flowability, high passing ability, high filling ability, and high segregation stability [1][2][3][4]. Although the SCC has been developed more than two decades ago, its practical use is still limited.…”

Section: Introductionmentioning

confidence: 99%

Utjecaj sastava mješavine samozbijajućeg betona na robusnost

Ghoddousi¹,

Salehi²

2015

JCE

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Effect of mix proportion on robustness of self-compacting concreteAn experimental program aimed at evaluating robustness of four distinct types of selfcompacted concrete (SCC) is presented in this paper. A control mix was designed and three series of mixes were made, with variation of principal fresh mix properties. In order to evaluate robustness, the selected mixes were subjected to variations in water content. The tested mixes were then ranked using the multi-attribute decision making method. The results indicate that the reduction in segregation resistance, and the decrease in the obstacle passing ability, lead to a considerable decrease in robustness of self-compacting concrete.Key words:self-compacting concrete, robustness, mix proportion, multi-attribute decision making Prethodno priopćenje Parviz Ghoddousi, Amir Masoud Salehi Utjecaj sastava mješavine samozbijajućeg betona na robusnost U ovom radu prikazan je eksperimentalni program ocjenjivanja robusnosti za četiri različita samozbijajuća betona (eng. Self Compacting Concrete -SCC). Projektirana je kontrolna mješavina te tri serije mješavina s razlikama u osnovnim svojstvima u svježem stanju. Za ocjenu robusnosti u odabranim mješavinama se mijenjala količina vode. Ispitane mješavine su zatim rangirane primjenom metode višeatributnog odlučivanja. Rezultati pokazuju da smanjenje otpornosti na segregaciju i smanjenje sposobnosti zaobilaženja prepreka uzrokuje značajno smanjenje robusnosti samozbijajućih betona.

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Durability characteristics of self-consolidating concrete designated for repair applications

Cited by 25 publications

References 8 publications

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Influences of PCE Superplasticizer on the Pore Structure and the Impermeability of Hardened Cementitious Materials

Prediction of Mechanical Properties of Frozen Soils Using Response Surface Method: An Optimization Approach

Utjecaj sastava mješavine samozbijajućeg betona na robusnost

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