Recently, nano-sized additives and supplementary cementing materials (SCM) have shown to improve the mechanical durability of mortars concretes. This study investigates incorporation nano-POFA (nPOFA) into cement paste so as observe its effect towards microstructure development cement. Additionally, micro-sized POFA (mPOFA) was also carried out for comparison. The mPOFA were subjected milling generation nPOFA. prepared nPOFA exhibited a BET specific surface area 145.35 m2/g with an average...

As the nanosized POFA (nPOFA) is expected to be a better supplementary cementing material (SCM) compared conventional POFA, comparative assessment of pozzolanic activity with various fineness was investigated. The as-received (rPOFA), microsized (mPOFA) and nPOFA were conducted via electrical conductivity, lime consumption (LC) strength index (SAI) test. particle size acquired from TEM analysis in range 20 nm 90 nm. nPOFA-lime system demonstrates highest relative loss conductivity (RLC) LC...

Integration of cement-based products with nanosized-palm oil fuel ash as supplementary cementing material (SCM) amend its hydration’s degree at early age phase and the microstructural groundworks are relevant to explain findings. Hence, present work investigates microstructure properties hardened cement paste (HCP) incorporating nPOFA study on effect in hydration an phase. An Ordinary Portland Cement (OPC) a set HCP blended microsized-palm (mPOFA) (10-30%) (10-60%) were prepared cured for 28...

Palm Oil Fuel Ash (POFA) is known as a good supplementary cementing material due to its siliceous-rich content. The application of nanotechnology in the pozzolanic materials could invent new functions efficiency physical and chemical properties materials. Thus, present study aims generate nano-sized POFA characterize physicochemical nano-palm oil fuel ash (nPOFA). nPOFA was prepared by mechanically grinding micro using high intensity ball milling for 6 hours. were characterized via X-Ray...

Modifying the glass features under controlled parameters is vital to achieving optimum final product for diverse applications. In this study, tellurite was prepared using melt quenching technique and heat treated at varying temperatures. The thermal stability, chemical durability, surface morphology were investigated by implementing DTA SEM-EDX. TZNE possesses ΔT of 115 °C. weight loss in distilled water ammonium hydroxide solution became apparent higher temperature due decrease its...

Video-based learning has recently gained popularity as one of the numerous choices in remote education approaches during pandemic that differs from conventional face-to-face lecture-based education. However, video-based and online teaching were different quite challenging for students, especially when studying statistics it is conducted remotely. Therefore, purpose this study to assess student satisfaction with on statistical topics. This was 357 foundations science students Preparatory...

During the COVID-19 pandemic in Malaysia, learning and teaching at home (PdR) was implemented to replace face-to-face sessions. The readiness of pre-university students implementation PdR helps delivering a high quality education. It can be studied through internet accessibility, environment, student economics, suitability online course content, type e-learning platform used, locality students. Hence, this preliminary study aims identify relationship between accessibility toward students’...

Hydrothermal synthesis of kalsilite was facilitated by the inclusion potassium carbonate (K2CO3) as source ion. After a 24 h reaction at 220 °C, kaolin clay treated with 1.25 M K2CO3 showed most significant peaks 2θ 28.5° and 34.7° X-ray diffraction corresponding to hexagonal kalsilite. In addition, field emission scanning electron microscopy images also revealed particles proving formation desired mineral. The orthorhombic boehmite monoclinic bayerite were formed dominant phases lower...

Students enrolled in Science, Technology, Engineering, and Mathematics (STEM) courses Malaysia have recently decreased, particularly among rural students. It is necessary to mobilize the effort awareness of importance STEM intensively, which supposedly begins at school level. Accordingly, AUMS Warriors, UMS organized Warriors program for students by using problem-based learning (PBL)-STEM modules promote education. Therefore, this study was conducted examine impact PBL-STEM module on terms...

Quarantine, isolation, and social distancing were essential for preventing the transmission of virus protecting people's physical fitness during ongoing COVID-19 pandemic. However, they may have had lasting negative impacts, notably on mental health well-being, especially higher education students, as are in a pivotal life-transition stage linked to increased crises. Therefore, main objective this study is assess influential factors associated with crises among foundation-level students This...

The jotter book concept is not a novel method in scientific research. This practice common only among undergraduate students but also postgraduate students, scientists, and researchers who use it to understand theories, concepts, newly learned experimental procedures since important significant pre-laboratory (pre-lab) preparation before an experiment conducted. However, using as one component of alternative assessment assessing student achievement at pre-University level something that has...

Over the last decade, online examinations have been widely practiced in both private and government sector. Working professionals preferred examination because it provides them with flexibility of time location. However, is not a common practice educational institutions. Examinations are always conducted traditional method through physical attendance, paper, pen. The outbreak covid-19 pandemic long duration lockdown game-changer towards assessment approaches that differs from face-to-face...