Utility of statistical models in proportioning self-consolidating concrete

Khayat, Kamal H.; Ghezal, Aïcha F.; Hadriche, M. S.

doi:10.1007/bf02479705

Cited by 81 publications

(26 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface settlement is influenced, in order of significance, by the dosage of powder, the volume of coarse aggregate (Vca) and the concentration of the VMA, and coupled effect of powder and SP, Vca and W/P ratio, and the dosage of powder and Vca [14]. The surface of settlement can be reduced by increasing the VMA concentration and aggregate content and reducing the paste volume, corresponding to an increase in aggregate content [14].…”

Section: Column Settlement Testmentioning

confidence: 99%

See 1 more Smart Citation

Filling ability and plastic settlement of self-compacting concrete

Sonebi

Bartoš

2002

Mat. Struct.

View full text Add to dashboard Cite

A B S T R A C T R I~ S U M I~The use of self-compacting concrete (SCC) facilitates the placing of concrete by eliminating the need for compaction by vibration. Given the highly flowable nature of such concrete, care is required to ensure excellent filling ability and adequate stability. This is especially important in deep structural members and wall elements where concrete can block the flow, segregate and exhibit bleeding and settlement which can result in local defects that can reduce mechanical properties, durability and quality of surface finish. This paper shows results of an investigation of fresh properties of self-compacting concrete, such as filling ability measured by slump flow and flow time (measured by Orimet) and plastic fresh settlement measured in a column. The SCC mixes incorporated various combinations of fine inorganic powders and admixtures. The slump flow of all SCCs was greater than 580 mm and the time in which the slumping concrete reached 500 rnm was less than 3 s. The flow time was less than 5 s. The results on SCCs were compared to a control mix. The compressive strength and splitting tensile strength of SCCs were also measured.The effects of water/powder ratio, slump and nature of the sand on the fresh settlement were also evaluated. The volume of coarse aggregate and the dosage of superphsticizer were kept constant. It can be concluded that the settlement of fresh self-compacting concrete increased with the increase in water/powder ratio and slump. The nature of sand influenced the maximum settlement. L'utilisation des bdtons autoplafants (BAP) facil(te la

show abstract

Section: Column Settlement Testmentioning

confidence: 99%

“…The surface of settlement can be reduced by increasing the VMA concentration and aggregate content and reducing the paste volume, corresponding to an increase in aggregate content [14].…”

Section: Column Settlement Testmentioning

confidence: 99%

Filling ability and plastic settlement of self-compacting concrete

Sonebi

Bartoš

2002

Mat. Struct.

View full text Add to dashboard Cite

show abstract

“…The different studies carried out made it possible to put forward a simple principle of formulation for the SCC: it is necessary to reduce the inter-granular friction at the different scales (cement, sand and aggregate). Thus, the volume of the paste must be increased to the detriment of gravette [10][11]. Thus, the volume of paste must be increased.…”

Section: Formulation Of Self-compacting Concretementioning

confidence: 99%

Use of Fillers for Optimal Formulation of Self-Compacting Concretes

Noufid¹,

Belattar²

2018

CivileJournal

View full text Add to dashboard Cite

The objective of this study is to achieve an optimal formulation of self-compacting concrete using local materials from the country of Morocco, the use of this type of concrete remains very limited compared to a concrete vibrated in this country, due to lack mastery by companies. We will therefore try to study an optimal formulation that respects European standards and gives comparable results, even improved, to those of vibrated concrete, in order to be able to replace vibrated concrete with self-compacting concrete in construction sites. Thus, SCC mixtures containing amounts of fillers were examined, and with different Portland cement dosages: 350; 375 and 400 kg/m 3 . The method of formulation is made in accordance with French regulations. The results obtained were compared to these vibrated concrete counterparts containing the same cement dosages. Tests include compression, traction and flexion tests at 3, 7 and 28 days of age. Several studies have been carried out internationally, but at the national level, there is no study to this effect. The results obtained show that there is an improvement in the strength of concrete, in addition to the liquid appearance of concrete. It is this last aspect that characterizes the SCC, which allows it a flow in the areas inaccessible by the vibrator, thus saving time and performance of the structure to achieve.

show abstract

“…That is why many authors have studied the influence of constituents on the flow properties of cementitious mixtures (paste, mortar and concrete) using statistical models [6][7][8][9][10][11]. All these studies use a factorial design approach in order to determine the effects of parameters on the flow properties and mechanical resistance.…”

Section: Introductionmentioning

confidence: 99%