scholarly journals Effect of Various Curing on High Strength Concrete Using Slag Cement

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Rahmi Karolina ◽  
◽  
M.A.P Handana ◽  
Rahmat Jatmikanto ◽  
◽  
...  
Keyword(s):  
Compressive Strength ◽  
Steel Production ◽  
Acid Water ◽  
Maximum Absorption ◽  
Type I ◽  
Cement Concrete ◽  
Slag Cement ◽  
High Quality ◽  
Normal Concrete ◽  
Water Curing

A The current environmental problem is regarding to CO2 gas emissions from cement production and the presence of hazardous material waste (B3) from steel production. One solution for that problem is by applying slag cement as a substitute for type I portland cement in concrete mix to create a high quality concrete that is environmentally friendly with a high durability and initial strength. This research aimed to compare a high quality concrete made from slag cement and a high quality concrete with conventional mixture. The slag cement used was obtained from PT. Indocement Indonesia. It is coupled with the use of Master Ease 3029 superplasticizer. The results showed that from the samples of concrete of 3, 7, 14, 28, 56 and 90 days of age, the maximum absorption value of normal concrete occurs at the age of 90 days with acid water curing of 1.57%. While the maximum absorption value of slag cement concrete occurs at the same age with acid water curing of 1.50%. The curing of normal concrete with water at 56 days of age has the largest compressive strength from all. It is also found that slag cement concrete has higher maximum compressive strength than that of normal concrete with acid water curing at 56 days of curing.

Compressive Strength of High Volume Slag Cement Concrete in High Temperature Curing

2011 ◽  
Vol 287-290 ◽  
pp. 793-796 ◽  
Author(s):  
Sasan Parniani ◽  
Mohd Warid Hussin ◽  
Farnoud Rahimi Mansour
Keyword(s):  
Compressive Strength ◽  
Working Conditions ◽  
High Volume ◽  
Strength Loss ◽  
Cementitious Material ◽  
Cement Concrete ◽  
Slag Cement ◽  
Hot Weather ◽  
Rate Of Evaporation ◽  
Compressive Tests

Recent consideration has been given to use of GGBFS as separate cementitious material mixed along with Portland cement in production of concrete. Problems are frequently encountered in producing good-quality concrete specially slag cement concrete in hot climates.Curing problems are exaggerated when concreting in hot weather, as a result of both higher concrete temperatures and increased rate of evaporation from the fresh mix. The disadvantage of GGBFS concretes is that they proved to be more sensitive to poor curing than OPC Therefore, special care must be taken when using this type of concrete, especially on site, where the working conditions and the application of curing are not as easy to control as in the laboratory concrete. The purpose of this paper is investigation and evaluation strength loss in slag cement concrete in poor curing situation. To carry out this aim, 72 cube specimens with three different proportion of slag are made and cured in two different conditions. And result of compressive tests compared together to determine susceptibility of GGBFS concrete in hot-dry condition.

Influence of Plasticizer on Properties of Blended Cement Concrete

2015 ◽  
Vol 824 ◽  
pp. 61-64
Author(s):  
Kirill Polozhiy ◽  
Jamal Akhter Siddique ◽  
Pavel Reiterman
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Blended Cement ◽  
Cement Concrete ◽  
Slag Cement ◽  
Red Clay ◽  
Clay Ceramics ◽  
Portland Slag Cement ◽  
Partial Activity

In this article Portland-slag cement was step by step replaced with pozzolana (fine red-clay ceramics) in concrete. This is first step of research that is why the only measured characteristics were consistency of mixtures and compressive strength. There were designed four mixtures with increasing replacement of Portland cement by 10 % each (CR, C1, C2, C3) where complete activity of pozzolana was assumed. Mixtures C4, C5 and C6 were designed with respect to presumed just partial activity of the used pozzolana (set as 40 %). The water/cement coefficient was decided to be taken according to the consistence of the mortar.

Strength of Concrete Containing Rice Husk Ash Subjected to Sodium Sulfate Solution via Wetting and Drying Cyclic

2014 ◽  
Vol 534 ◽  
pp. 3-8 ◽  
Author(s):  
Che Wan Che Norazman ◽  
Ramadhansyah Putra Jaya ◽  
Sri Jayanti Dewi ◽  
Badorul Hisham Abu Bakar ◽  
M.A. Fadzil
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Sodium Sulfate ◽  
Rice Husk Ash ◽  
Blended Cement ◽  
Sulfate Solution ◽  
Target Strength ◽  
Type I ◽  
Cement Concrete ◽  
Cement Replacement

The influences of different replacement levels of rice husk ash (RHA) blended cement concrete subjected to 5% Na2SO4 solution via wetting-drying cycles was evaluated in this study. RHA was used as a Portland cement Type I replacement at the levels of 0%, 10%, 20, 30%, and 40% by weight of binder. The water-to-binder ratio was 0.49 to produce concrete having target strength of 40 MPa at 28 days. The performance of RHA blended cement concrete on compressive strength, reduction in strength and loss of weight was monitored for up to 6 months. The results of the compressive strength test have been shown that use of RHA in blended cement has a significant influence on sulfate concentration. When increasing the replacement level of RHA, the strength of concrete also increases in comparison to OPC concrete (except RHA40) even exposed to 5% Na2SO4 solution. On the other hand, the reduction in strength and weight loss of specimens increased with increase in the exposure time. Generally, it can be said that the incorporation of rice husk ash as cement replacement significantly improved the resistance to sulfate penetration of concrete. Finally, RHA cement replacement in concrete mixed provided better resistance to sodium sulfate attack up to 6-month exposure.

scholarly journals Effect of the Curing Condition and High-Temperature Exposure on Ground-Granulated Blast-Furnace Slag Cement Concrete

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Eskinder Desta Shumuye ◽  
Jun Zhao ◽  
Zike Wang
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Curing Temperature ◽  
Stable Phase ◽  
Cement Concrete ◽  
Slag Cement ◽  
High Temperature Exposure ◽  
Curing Condition ◽  
Temperature Exposure

AbstractIn this study, the effect of curing temperature on the properties of slag cement concrete after high-temperature exposure was studied, and elevated curing temperature (45 ± 2 °C and 95% relative humidity (RH)) was selected to compare with the standard curing temperature (20 ± 2 °C and 95%RH). Four different concrete mixes with the same mix proportion, except for different slag replacement ratios, were used: 0% (reference), 30% (slag), 50% (slag), and 70% (slag). After high-temperature exposure at 200, 400, 600, and 800 °C, the effect of slag replacement, high temperature, and curing temperature on the compressive strength and mineralogical and microstructural properties of slag cement concrete were studied. Test results indicated that the compressive strength of concrete cured for 7 d at elevated temperatures increased by 28.2, 20.7, 28.8, and 14.7% compared with that cured at the standard curing condition at slag percentages of 0, 70, 50, and 30%, respectively. X-ray diffraction (XRD) and Scanning electron microscope (SEM) results revealed that concrete cured at elevated temperatures exhibited a more condensed phase and contained a higher percentage of hydrates than that cured for 7 d in the standard curing condition. However, after 56 d of curing, concrete in the standard curing condition exhibited a more stable phase and a higher concentration of hydrates.

scholarly journals Evaluation of Thermal Effects on Slag Cement Concrete’s Strength Properties

2021 ◽  
Vol 1 (3) ◽  
pp. 11-15
Author(s):  
Michael Tiza
Keyword(s):  
Compressive Strength ◽  
Thermal Resistance ◽  
Concrete Strength ◽  
Strength Loss ◽  
Strength Properties ◽  
Industrial Applications ◽  
Significant Loss ◽  
Cement Concrete ◽  
Slag Cement ◽  
Hardness Property

The physical, chemical, and mechanical characteristics of concrete change with heat-fire. The effect of thermal load on Slag cement concrete output must be measured because of the crucial role of thermal resistance in concrete structure performance and operation. This work examines the thermal resistance of Slag cement concrete. The concrete cubes were produced and cured for 28 days and then subjected to varying temperatures range of 100°C, 150°C, 200°C, 250°C, and 300°C. Hardness and compressive strength were measured at 30, 45, and 60 minutes; the sample results were compared to those of ordinary Portland cement used for the study. The findings of this experiment demonstrate that strength loss was 0.45% at 100 °C, 1.75% at 150 °C, 2.67% at 200°C, 5.98% at 250°C and 12.04 % at 300 °C, the hardness property increased from 100° to 150°C but decreased with higher temperatures. However, average concrete loss at 300 °C exceeds 20 percent of its compressive strength. This means that higher temperatures have adverse effects on concrete strength. From the test, however, it has been noted that there was an insignificant loss of strength of concrete at temperatures below 250°C and however, above 250 °C, a significant loss of concrete strength was observed. The results indicate that slag concrete has a significantly higher thermal resistance potential than traditional concrete and can be used even in industrial applications.

The Effect of Integral Waterproof Admixture on some Mechanical Properties of Concrete, Absorption and Sulfate Attack Using Different Mix Proportions

2021 ◽  
Vol 895 ◽  
pp. 88-96
Author(s):  
Qusay A. Jabal ◽  
Mohammed Riyadh Al-Dikheeli
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Sulfate Attack ◽  
Cement Concrete ◽  
Normal Concrete

. This investigation aims to improving mechanical properties of normal concrete such as compressive strength, tensile strength, and flexural strength by using integral waterproof admixture (IWP) and also decreasing absorption of concrete, using different mix proportions of concrete, study shows a good increment of compressive strength for all mixes by using integral waterproof and also increasing the flexural and tensile strengths. The study contains also a sulfate attack study on normal mixes and integral waterproof mixes. Different percentages of IWP used in the study containing 0.0%, 1% ,1.5% and 2% for each 100 kg cement. Concrete mixes with 2% IWP admixture and 1:1:1.5 mix proportions give the highest values of compressive, tensile, and flexural strength in the study. compressive strength improved from 33.6MPa for reference 1:1:1.5 mix to 39.8 MPa by using IWP, also less absorption concrete obtained, the absorption was lowered from 3.5% to 1.7%, also deterioration in strength due to sulfate attack was small compared with reference mixes, same to other mixes 1:2:4, 1:1.5:3 that also improved by IWP admixture and lead to increasing mechanical properties and reducing absorption and sulfate attack.

Effect of Curing Regime on Compressive Strength of Concrete Containing Malaysian Laterite Aggregate

2012 ◽  
Vol 626 ◽  
pp. 839-843 ◽  
Author(s):  
Norul Wahida Kamaruzaman ◽  
Khairunisa Muthusamy
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Curing Process ◽  
Normal Concrete ◽  
Strength Performance ◽  
Compressive Strength Test ◽  
Water Curing ◽  
Compressive Strength Of Concrete ◽  
Curing Regime ◽  
Curing Age

Concrete subjected to improper curing process would exhibit poor strength performance due to incomplete hydration process. This research investigate the effect of curing regime towards compressive strength of concrete containing Malaysian laterite aggregate (MLA) as partial coarse aggregate replacement. Concrete specimens produced using a range of laterite aggregate replacement from 0 to 50% were placed in different curing regime namely water curing, natural weather curing and air curing until the testing date. Specimens were subjected to compressive strength test in accordance to BS EN 12390 at 60 days. The results show strength of all specimens except the air cured samples increase as the curing age become longer. It was found that water curing is the most suitable for better performance of laterite concrete. The presence of water throughout the curing process is very much crucial for laterite concrete strength developement compared to normal concrete.

Effect of Specimen Size and Curing Condition on the Compressive Strength of Alkali-Activated Concrete

2017 ◽  
Vol 2629 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Robert James Thomas ◽  
Sulapha Peethamparan
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Specimen Size ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Slag Cement ◽  
Fly Ash Concrete ◽  
Activated Slag ◽  
Alkali Activated Concrete ◽  
Alkali Activated

Alkali-activated concrete is a rapidly emerging sustainable alternative to portland cement concrete. The compressive strength behavior of alkali-activated concrete has been reported by various studies to a limited extent, but these discussions have been based on minimal evidence. Furthermore, although it is known that specimen size has a distinct effect on the apparent compressive strength of concrete, this effect has yet to be modeled for alkali-activated concrete. This paper presents the results of a comprehensive study of the effects of curing condition (i.e., moist-cured at ambient temperature for 28 days or heat-cured at 50çC for 48 h) and specimen size on the compressive strength of sodium silicate–activated fly ash and slag cement concrete. The heat-cured strength of alkali-activated slag cement concrete was linearly related to the moist-cured strength; the former was about 5% greater than the latter. Heat curing also improved the strength of alkali-activated fly ash concrete, although the effect was greatly magnified for lower-strength mixtures and was much less significant at higher strengths. Existing size effect laws employed for portland cement concrete proved reasonably accurate in describing the effect of specimen size on the apparent strength of alkali-activated slag cement concrete. However, these existing models greatly underestimated the size effect in alkali-activated fly ash concrete; the authors suggest that this finding was the result of significant microcracking in the alkali-activated fly ash concrete.

scholarly journals PENGARUH ZAT ADITIF TERHADAP KUAT TEKAN BETON K-225 MENGGUNAKAN BATU BASALT SCORIA

2018 ◽  
Vol 3 (1) ◽  
pp. 1-8
Author(s):  
Cahya Sujatmiko
Keyword(s):  
Compressive Strength ◽  
Research Method ◽  
Material Technology ◽  
High Quality ◽  
Normal Concrete ◽  
Concrete Material ◽  
Implementation Techniques ◽  
Average Compressive Strength ◽  
Test Objects

Indonesia is a developing country that is doing a lot of development in all areas such as: the construction of buildings, bridges, dams, canals, and others. Various studies and experiments in the concrete field are carried out as an effort to improve the quality of concrete, material technology and implementation techniques obtained from the results of research and experiments intended to answer the increasingly high demands on the use of concrete and overcome the obstacles that often occur in the implementation work at outdoor. The use of added materials (Admixture) can help solve these problems. The purpose of this study was to determine the extent of the influence of additives on the compressive strength of k-225 concrete using basalt scoria stone. The making of k-225 concrete used cuboid sized molds (15cm x 15cm x 15c) in research into the manufacture of concrete to produce high quality concrete. The research method used was an experimental method conducted at the laboratory of PT. Gig Polah Raya Jl. Lintas Sumatera KM 22 Sukabandung South Lampung, namely by carrying out or physically experimenting on concrete tests, which used additives, as many as 24 test objects, namely 6 without additives and 6 additives 0.45%, and 0.55% and 0.63% and normal compressive strength k-225. The aim is to know the average compressive strength between normal concrete and concrete using a mixture of additives as a reference.

scholarly journals Controlled Temperature Plain Cement Concrete

2019 ◽  
Vol 8 (12S) ◽  
pp. 1023-1025
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Cold Temperature ◽  
Cement Concrete ◽  
Normal Concrete ◽  
Conventional Concrete ◽  
Heavy Machinery ◽  
Concrete Cylinders ◽  
Temperature Controlled ◽  
Temperature Water

This study attempts to compare the strength between normal concrete and controlled temperature concrete. Concrete cubes are prepared with normal and cold temperature water to know and compare the compressive strength between them. Concrete cylinders are prepared with normal and cold temperature water to know and compare the tensile strength between them. Temperature controlled concrete are more use full in heavy machinery areas which is proved by comparison of compressive strength and tensile strength between temperature controlled concrete and conventional concrete

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