scholarly journals Study Pembuatan Durable Cement dengan Penambahan Pozzolan Silica Fume

2018 ◽  
Vol 2 (1) ◽  
pp. 31
Author(s):  
Nanik Hendrawati ◽  
Endah Dwi Rahmayanti ◽  
Evi Dyah Priapnasar
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Room Temperature ◽  
Test Method ◽  
National Standard ◽  
Cement Sample ◽  
Cement Compound ◽  
Compressive Strength Of Concrete ◽  
Reactive Silica ◽  
Compression Resistance

Selama ini silica fume dikenal sebagai bahan campuran pembuatan beton karena dapat meningkatkan kuat tekan beton, menurunkan permeabilitas beton dan memiliki ketahanan sulfat yang tinggi. Dalam penelitian ini mencoba mengaplikasikan silica fume pada pembuatan durable cement. Silica fume dijadikan sebagai bahan pozzolan karena didalamnya mengandung silica tinggi yang bersifat reaktif agar dapat meningkatkan ketahanan terhadap sulfat. Bahan pozzolan ini dapat bereaksi dengan Ca(OH)2 pada suhu biasa untuk membentuk senyawa bersifat semen. Pada penelitian ini silica fume divariasikan mulai dari 0; 7,5; 15; 22,5; 30; 37,5%. Durable cement ini akan diuji ketahanan sulfatnya dengan menggunakan metode pengujian kuat tekan. Hasil percobaan menunjukkan terjadinya penururan nilai kuat tekan sampel pada umur 7 dan 28 hari jika dibandingkan dengan blanko. Hal ini disebabkan lambatnya reaksi pozzolan (silica fume). Namun proses peningkatan kuat tekannya akan terus berlanjut hingga setelah umur 360 hari. Jika dibandingkan dengan Standar Nasional Indonesia (15-0302-2004) semen PPC tipe IP-K, hasil sampel durable cement masih memenuhi standar untuk variabel dengan penambahan silica fume antara 7,5% sampai 22,5%. Silica fume is known as a mixture of concrete manufacturing since it can increase the compressive strength of concrete, decrease the permeability of concrete and have a high resistance to sulfates. In this research, try applying silica fume to make durable cement. Silica fume is converted to pozzolan because it contains highly reactive silica to increase sulfate resistance. This pozzolan material can react with Ca (OH)2 at a  room temperature to form a cement compound. In this study, silica fume  was varied from 0; 7.5; 15; 22.5; 30; 37.5%. The durable cement will be tested for its resistance to sulfates by using a compression resistance test method. The results showed that the compressive strength of the sample was decreased at 7 and 28 days compared to the blanks. This is due to the slow reaction of pozzolan (silica fume). But the process of increasing the resistance to compression will continue until after 360 days. Compared with Indonesia cement national standard (15-0302-2004) of PPC type IP-K, the durable cement sample still meets the standard for variables with the addition of silica fume between 7.5% and 22.5%.

scholarly journals Research on Mechanical Performance & Behaviour of Geopolymer Concrete Subjected to Elevated Temperatures

2019 ◽  
Vol 8 (2S8) ◽  
pp. 883-887
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Silica Fume ◽  
Elevated Temperatures ◽  
Mechanical Performance ◽  
Geopolymer Concrete ◽  
Sem Images ◽  
Before And After ◽  
Alkaline Conditions ◽  
Compressive Strength Of Concrete

The investigative studies on mechanical performance & behaviour, of Geopolymer Concrete (GPC) before and after the exposure to elevated temperatures (of 200 0 C -1000 0 C with an increment of 100 0 C). Indicate that the GPC Specimens Exhibited better Compressive strength at higher temperatures than that of those made by regular OPC Concrete with M30 Grade. The chronological changes in the geopolymeric structure upon exposure to these temperatures and their reflections on the thermal behaviour have also been explored. The SEM images indicate GPC produced by fly ash , metakaolin and silica fume, under alkaline conditions form Mineral binders that are not only non-flammable and but are also non-combustible resins and binders. Further the Observations drawn disclose that the mass and compressive strength of concrete gets reduced with increase in temperatures.

scholarly journals Thermal and mechanical properties of PCM-incorporated normal and lightweight concretes containing silica fume

2019 ◽  
Vol 46 (7) ◽  
pp. 643-656 ◽  
Author(s):  
Amin Moshtaghi Jafarabad ◽  
Morteza Madhkhan ◽  
Naser P. Sharifi
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Thermal Performance ◽  
Phase Change Materials ◽  
Mechanical Characteristics ◽  
Lightweight Aggregate ◽  
Salt Hydrate ◽  
Promising Strategy ◽  
Compressive Strength Of Concrete ◽  
Physical And Mechanical Characteristics

Improving the thermal performance of concrete, as an important construction and pavement material, by incorporating phase change materials (PCMs) has been the topic of much research. Also, various carrier agents such as lightweight aggregate (LWA) have been introduced to incorporate PCMs into concrete. However, incorporation of PCM-impregnated LWA reduces the compressive strength of concrete. In this study, the application of silica fume to improve the compressive strength of PCM-incorporated concrete is investigated. Two types of PCMs, salt hydrate PCM and polyethylene glycol PCM, were incorporated into concrete via scoria LWA, and different physical and mechanical characteristics of the concrete were studied when silica fume was incorporated into the mix. The results show that incorporation of silica fume increases the compressive strength of PCM-incorporated concrete, and at the same time does not diminish the thermal performance of the incorporated PCM. Therefore, incorporation of silica fume was found to be a promising strategy to improve the compressive strength of PCM-incorporated concrete.

scholarly journals Comparison of Compressive Strength of Concrete by Partial Replacement of Cement with GGBS and Silica Fume with Sea Water Curing and Addition with Fibers

2021 ◽  
pp. 31-39
Author(s):  
A Aswani and Janardhan G
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Sea Water ◽  
Glass Fibers ◽  
Vital Role ◽  
Strength Test ◽  
Partial Replacement ◽  
Compressive Strength Test ◽  
Water Curing ◽  
Compressive Strength Of Concrete

In construction world concrete plays a vital role, around 60% of structure consists of Concrete. However, the production of Portland cement, an essential constituent of concrete, leads to the release of significant amounts of CO2, depletion of natural resources and environmental degradation. This paper investigates the compressive strength of concrete by replacing cement with GGBS and silica fume effect of glass fibers on performance of concrete is studied. In this present work a humble attempt had been made to evaluate and compare the compressive strengths of GGBS blended concrete cubes with controlled concrete cubes cured under sea water for 28 days. By conducting the tests on the cubes, conclusions were drawn after plotting and analyzing the results. Compressive strength test is conducted on the samples after 28 days. The optimum value is obtained at 15% replacement with GGBS and 5% with Silica fume. In this study again we trailed addition with Glass fibers with the percentage of 0.5%,1.0%,1.5%, compressive strength have been studied. Finally at 1.0% addition we get maximum strength compared to controlled mix.

Sign in / Sign up

Export Citation Format

Share Document