Prediction of the Effect of GGBFS on the Hydration of Cement Using Extended CEMHYD3D Model | Chapter 2 | Theory and Applications of Engineering Research Vol. 5

The study presents important findings on predicting the behavior of a Portland cement-based mixture, specifically regarding hydration. Supplementary cementitious materials (SCMs) such as ground granulated blast furnace slag (GGBFS), often called slag cement, fly ash (FA), and silica fume (SF) are widely used in cementitious composites due to their durability, environmental friendliness, and minimal cost. Portland cement is usually substituted with granulated blast furnace slag (GGBFS) to make a blended cement. A slag-blended cement has a more complicated hydration process than Portland cement due to the interactions between the slag reaction and the hydration of Portland cement in the cementitious systems. Understanding the effect of slag substitution on the hydration of cement is still challenging. To achieve this, the extended CEMHYD3D model was employed to predict the hydration of a slag-blended cement. An OPC as a reference cement confirmed to ASTM C 150 and a slag confirmed to ASTM C 989 standard requirements were used in this study. The simulation was done with cement paste samples made with various w/c ratios and different slag substitution levels, in which the interaction between the hydration of Portland cement and the reaction of slag was considered. The prediction model has been validated with experimental results and verified to be successful in predicting the hydration of slag-blended cement. The consideration of the chemical composition of slag improves the predictability of hydration in cement, and the same method was applied in this model. Both in the early age and up to the age of 90 days, the hydration of slag-blended cement can be predicted with the proposed model.

Author(s) Details:

Andualem Yadeta,
Department of Civil Engineering, Delhi Technological University, Delhi 110042, India and Department of Construction Technology and Management, Madda Walabu University, Bale Robe 242, Ethiopia.

Pradeep Goyal,
Department of Civil Engineering, Delhi Technological University, Delhi 110042, India.

Raju Sarkar,
Department of Civil Engineering, Delhi Technological University, Delhi 110042, India.

Please see the link here: https://stm.bookpi.org/TAER-V5/article/view/13293

Influence of Morphology on Angle of Internal Friction in Slags | Chapter 9 | Recent Progress in Science and Technology Vol. 9

 The depiction of any granular material is contingent upon its semantic parameters, as well as allure physical and chemical characteristics. Slags from the iron and steel commerces are used for this study, and their morphology is distinguished to their angle of internal friction. These limits are determined using ImageJ operating system on slag samples. The semantic parameters are roundness, fullness, and surface roughness. According to the literature, atoms with lengthened, angular, and rough surfaces proper to be more resistant to shearing than round, round, and smooth particles. This paper decides that roundness values in slags, alternatively sphericity, are in trend accompanying friction angle. It is also noticed that regardless of fullness or roundness, the angle of internal resistance remains within a narrow range. Certain pieces, which are dependent on something crushing under load, will not behave as anticipated based on their shape parameters. As a result, the shape limits alone can be insufficient to adequately show the frictional characteristics. ImageJ is a 2D particle reasoning programme. Even if 3D analysis is performed, skilled is no guarantee that the particle will properly as expected because piece orientation also plays a meaningful role in allure mechanical behaviour.

Author(s) Details:

J. Logeshwari,
Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai- 600062, India.

P. V. Sivapullaiah,
Department of Civil Engineering, Indian Institute of Science, Bangalore-560012, India.

Please see the link here: https://stm.bookpi.org/RPST-V9/article/view/10270

Optimisation Approach and Influence of Composition and Curing Parameters on Algerian Geopolymer Paste Compressive Strength Based on Metakaolin and Slag Local Materials| Chapter 8 | Current Overview on Science and Technology Research Vol. 10

 The soluble base-activated cement has existed proposed as an alternative to Portland cement and has proved good physical, machinelike, and durability features as well as low incidental impacts.This work aims to study the production of Metakaolin/Blast kiln slag (MK/S) located geopolymer. We investigated the influence of metakaolin content, the concentration in the soluble solution, the SiO2/Na2O a hard bony structure in the jaws of vertebrates ratio, the healing temperature, and the curing occasion using a brimming factorial design with two levels to comment how the variation of these limits promotes the modifications on the new and hardened properties of presented geopolymer. Then, we analysed the optimisation of the main parameter effect, the interplays, and the predicted reaction of the generated model using factorial design in mathematical software JMP Trial 16.The limits such as something that chops ratio MR (1.5 - 2), the density of solutionDS (1.3 -1.4) g/cm3, the healing temperature of kiln OT(60- 100)C° and the curing period CT (6- 48)h were considered for each consolidation of MK/S: [(50 % MK / 50%S), ( 80 % MK /20%S ) and ( 100 % MK/ 0 % S)].

Author(s) Details:

Zeghichi Leila,
Civil Engineering Department, University of Biskra, Algeria.

Mehsas boumedienne,
LMMS Laboratory, University of M'sila, Algeria.

Benghazi zied,
Mining Institute, University of Tebessa, Algeria.

Please see the link here: https://stm.bookpi.org/COSTR-V10/article/view/8907