Simulation and Development of Instrumental Setup to Be Used for Cement Grouting of Sand Soil

Bakar, Ismail; Ahmed, Kemas

doi:10.28991/esj-2017-01112

Cited by 17 publications

(11 citation statements)

References 9 publications

(13 reference statements)

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“…Correspondingly, further study into cement products with reduced environmental consequences and increased economic advantages is needed [1]. This is because cement is one of the most common materials used to perform grouting either for soil or for the rehabilitation of concrete cracks [2].…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the Properties of Metakaolin-based (Na, K)-Geopolymer Using Taguchi Design Method

Al-Dujaili

Disher

Hassan

2020

IJE

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Geopolymer paste is an innovative construction material which shall be produced by chemical action of inorganic molecules. It is a more environmentally friendly alternative to conventional Portland cement which is abundantly available worldwide. In this study, the influence of different alkaline activators (Na and K) on the mechanical and thermal behaviors of metakaolin-based geopolymer was investigated. The aims of this study is to find out the mixes and their process parameters, which are appropriate to produce Geopolymer paste with one of the highest compressive strength, highest-lowest porosity and highestlowest initial and final setting time. Taguchi method is used in the design of the experiments for the metakaolin-based Geopolymer. Five factors were selected as process parameters that are more likely to affect the Geopolymer characteristics. These are the amount of Si, alkali type, alkali reagents ratio, mixing time, and water content. The effect of these parameters on the setting time, density, porosity, compressive strengths at 7 and 28 days. The results of study found that the Geopolymer paste with high compressive strength of (107.2MPa) can be obtained with the formula (0.2K2O.0.8Na2O. Al2O3. 3.6SiO2.xH2O) using proper processing condition in which the alkali silicates to the alkali hydroxides molar ratio should be kept in the range of 2.26. The results revealed that the use of alkali solution of Kions and Na-ions improves the compressive strength of the geopolymer remarkably as compared with the use of Na-ions solution along. In addition, it has been noticed that the setting time is reduced, for geopolymers with silica content of less than 3.8, when K-ions is used. Similarly, the bulk density of geopolymers is found to be reduced by adding K-ions.

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Section: Introductionmentioning

confidence: 99%

“…Many efforts were applied toward developing high performance concrete for the building structures with enhanced performance and safety [4]. Geopolymers are the product of alkali activated aluminosilicate sources that excelled as an alternative to ordinary binders due to its sustainability, low cost and good mechanical properties [2].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Properties of Metakaolin-based (Na, K)-Geopolymer Using Taguchi Design Method

Al-Dujaili

Disher

Hassan

2020

IJE

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“…The use of SCMs such as fly ash, metakaolin, and rice husk ash, copper slag, ground granulated blast furnace slag (GGBS), marble powder etc., makes it affordable for the construction industry due to reduced cost. Addition of these SCMs are also found to be advantageous in the cement based grouting application [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Analytical Study on Alccofine Based High Strength Concrete

Sagar

Sivakumar

2020

IJE

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The use of supplementary cementitious materials (SCMs) in concrete manufacturing is considered as financial, technical and environmental benefit. In this regard, this paper presents the experimental and analytical study of high strength concrete (HSC) with alccofine-1203 (alccofine) and fly ash as partial replacements to cement. A total of seven mixes were prepared with different percentages of alccofine (4-14%). The prepared concrete mixes were experimentally tested for slump, compressive, flexural and split tensile strengths for 7, 28, and 56-days curing ages. Uniaxial stress-strain behavior, and water absorption and porosity were evaluated at 28-days curing age. Young's modulus, energy absorption capacity (EAC) and integral absolute error (IAE) were assessed analytically. From the test results, it was observed that the replacement of cement with alccofine significantly improved the workability of the concrete. Among all the mixes, the mix with 10% alccofine content exhibited good behavior in all the investigated parameters. The alccofine incorporation was found to have a negative effect on the behavior of HSC beyond 10% replacement in all the investigated parameters. Based on the experimental compressive strength results, empirical relations were proposed to predict the flexural and split tensile strengths. The proposed empirical relations have the lowest IAE (3.29 and 3.32% for flexural and split tensile strength) in comparison with ACI-318, IS 456 and empirical relations proposed by earlier researchers.

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“…Few quantitative studies were undertaken regarding the erosion pattern as well as the maximum distance of the scour hole from the structures [20]. More recently, Zhang et al [21], and Movahedi et al [22] established an expression to predict the sediment scour depth using Flow3D or Fluent, a computational fluid dynamics (CFD) software [23][24][25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Modeling and Evaluation Sediment Scouring in Riverbeds around Downstream in Flip Buckets

Khalifehei

Azizyan

Shafai-Bajestan

et al. 2020

IJE

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Flip buckets are a common configuration for side channel spillways. Similar to other spillways, the flip bucket or ski jump has its disadvantages, among which the scour hole downstream due to the flip bucket jet is the most important. The structure safety and stability may be influenced by the scour holes generated at the downstream side of bucket type energy dissipators. This study has employed an experimental model in order to examine the sediment scour created at the end of flip bucket energy dissipators at various flow rates and tail water depths. A total of 45 experiments were performed under different conditions. The experimental invistigation was conducted at the hydraulic laboratory of Shahid Chamran University in Iran. The main objective of this research was to identify the maximum depth of sediment scour () and the maximum distance of sediment scour hole () from the structures. The results showed that the maximum depth of scour and its distance from the structure increased by increasing discharge. The results of experimental models show that, at the downstream depths () of 0.2 and 0.3 m, the stack was formed by the scouring at the upstream side of the hole, and at a depth of 0.1 m, this stack was transferred to the area after the scour hole. This could be explained by the fact that at downstream depths of 0.2 and 0.3 m, the rolling flow moved from the bottom upwards in the opposite direction of the water flow and sequestrated the sediments upstream. According to Equation Mean Absolute Relative Error (MARE) proposed relation based on laboratory studies has MARE of about 34.2%.

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Simulation and Development of Instrumental Setup to Be Used for Cement Grouting of Sand Soil

Cited by 17 publications

References 9 publications

Optimizing the Properties of Metakaolin-based (Na, K)-Geopolymer Using Taguchi Design Method

Optimizing the Properties of Metakaolin-based (Na, K)-Geopolymer Using Taguchi Design Method

An Experimental and Analytical Study on Alccofine Based High Strength Concrete

Experimental Modeling and Evaluation Sediment Scouring in Riverbeds around Downstream in Flip Buckets

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