COMPARATIVE INVESTIGATION OF STRENGTH PROPERTIES OF CONCRETE MIXED WITH VARIOUS POWDER AS ALTERNATIVE CEMENTITIOUS MATERIALS

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Isamu Yoshitake ◽  
Keisuke Miyamoto ◽  
Jun Mizushima ◽  
Kurumi Yamamoto ◽  
Koichiro Yamato
Keyword(s):  
Concrete Strength ◽  
Cementitious Materials ◽  
Comparative Investigation ◽  
Strength Properties ◽  
Cementitious Material ◽  
Limestone Powder ◽  
Mineral Admixtures ◽  
Powder Materials ◽  
Slag Powder ◽  
Chloride Resistance

Mineral admixtures are often mixed in concrete as an alternative cementitious material. The use of powder materials indirectly contributes to mitigation of environmental impact caused from Portland cement production which is a major source of CO2 emission. Furthermore, some of powder can improve properties of fresh and hardened concretes. A huge number of reports examining effects of admixture have been published in the world. However, it is not easy to compare the effect of admixture under a certain test condition. The present study aims to examining strength properties of concrete incorporating various admixtures. All admixtures tested herein were mixed in concrete as an alternative cementitious material, and the cement replacement ratios were in the range of 0.2 to 0.6. The tested powder materials are limestone powder, fly-ash, blast furnace slag powder, silica-fume, and inorganic admixture which was recently developed to increase chloride resistance. The focus of the study is to quantify the effect of these admixture on concrete strength. The paper reports compressive, split tensile and flexural strengths of these concretes, and discusses the effect of powder materials.

STRENGTH PROPERTIES OF DURABLE CONCRETE MADE WITH VARIOUS ALTERNATIVE CEMENTITIOUS MATERIALS

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Isamu Yoshitake ◽  
Shun Inoue ◽  
Keisuke Miyamoto ◽  
Koichiro Yamato
Keyword(s):  
Cementitious Materials ◽  
Strength Properties ◽  
Cementitious Material ◽  
Limestone Powder ◽  
Replacement Ratio ◽  
Cement Replacement ◽  
Fundamental Properties ◽  
Slag Powder ◽  
Chloride Attack ◽  
Efficiency Factors

Many researchers investigated various concrete made with the cementitious materials, hence the effects of various admixture are well known. Most researches focused on an alternative cementitious material, tested concrete properties by varying the cement-replacement ratio. The optimum cement-replacement ratio may be different by each admixture. The present study examined the strength properties of concrete incorporating various admixtures. The cementitious materials tested in this study were fly-ash, blast furnace slag powder, silica-fume, limestone powder, and an artificial admixture which has high resistance to chloride attack. First, fundamental properties of the concrete incorporating the admixture were summarized referring to previous durability tests. Second, the strength properties of concrete made with some cement-replacement ratios by the cementitious materials were examined. In addition, alternative cement efficiency factors (k) of each cementitious material were estimated.

Research on the Volume Stability of Ternary Cementitious Systems Incorporating Fly Ash and Slag Powder

2009 ◽  
Vol 405-406 ◽  
pp. 256-261
Author(s):  
Hua Quan Yang ◽  
Shi Hua Zhou ◽  
Yun Dong
Keyword(s):  
Fly Ash ◽  
Ternary System ◽  
Cementitious Materials ◽  
Volume Shrinkage ◽  
Mineral Admixtures ◽  
High Quality ◽  
Volume Stability ◽  
Slag Powder ◽  
Cementitious Systems

The paper investigates the volume shrinkage of different cementitious materials. The results indicates the type and fineness of cement have significant effect on the volume stability of hardened paste, namely, the concrete with higher fineness cement has worse volume stability. The addition of mineral admixtures makes the volume stability of cementitious materials become complex. The mineral admixtures of high quality can reduce the shrinkage of hardened paste, and the duality system of cement incorporating fly ash have better volume stability than the ternary system of cement incorporating fly ash and slag powder.

scholarly journals Influence of boulder machine-made sand powder on compressive strength of concrete

2021 ◽  
Vol 293 ◽  
pp. 02023
Author(s):  
Pengtao Wang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Early Stage ◽  
Cementitious Materials ◽  
Mineral Admixtures ◽  
Rock Powder ◽  
Manufactured Sand ◽  
Slag Powder ◽  
Compressive Strength Of Concrete ◽  
Curing Age

In order to recycle the boulder powder produced in the process of manufactured sand production and reduce the cost of engineering concrete, this article studied the influence of boulders powder on the compressive strength of concrete. The results show that in the early stage of concrete test, the compressive strength of rock powder concrete is slightly lower than of fly ash and mineral powder concrete. With the development of curing age, the strength of boulders powder concrete developed slower. As the increase of boulders powder content, the compressive strength of different curing age gradually decreased, and it was suggested that the content of boulders powder should be controlled within 20% of cementitious materials mass. The positive effect of boulders powder fineness on the strength of concrete is limited, so it is suggested to use unprocessed collected boulders powder in the project, which is economical and environmentally friendly. With the adjustment of water-to-binder ratio, boulders powder can be prepared with different strength grades of concrete to meet the needs of engineering; the composite of boulders powder with traditional mineral admixtures, such as fly ash, and especially granulated blast furnace slag powder, can significantly improve the strength of concrete.

scholarly journals Research on C30 Concrete Mix Proportion in Guangdong Province

2020 ◽  
Vol 213 ◽  
pp. 02039
Author(s):  
Guangxing Lai ◽  
Jianli Yin ◽  
Junhui Ye ◽  
Yujia Chen ◽  
Wei Xiao
Keyword(s):  
Guangdong Province ◽  
Cementitious Materials ◽  
Cementitious Material ◽  
Bleeding Rate ◽  
Slag Powder ◽  
Mix Proportion ◽  
Concrete Mix ◽  
Water Test ◽  
The Difference ◽  
Bleeding Water

The reasons of C30 concrete bleeding in winter in Guangdong province were studied by collecting the concrete mix proportions of C30 concrete mixing plants in Guangdong, Fujian, Henan, Hunan, Chongqing and Shaanxi regions, the difference between the concrete mix proportions in Guangdong and other regions was investigated. Based on the representative concrete mix proportion in Guangdong province, the concrete bleeding water test was carried out, and the correlation between the amount of different cementing materials and the bleeding rate was investigated. The results showed that compared with other regions, the C30 concrete mix proportion in Guangdong has the lowest total cementitious material, which made it more prone to bleeding. The amount of slag powder and the total amount of cementitious materials have a high correlation with the bleeding rate. With the increase of the amount of slag powder and the total amount of cementitious materials, the bleeding rate decreases.

Study on the Density and Performance of Cementitious Materials Compounded by Multiple Mineral Admixtures

2011 ◽  
Vol 374-377 ◽  
pp. 1446-1450
Author(s):  
Hui Xu ◽  
An Qi Lu
Keyword(s):  
Compressive Strength ◽  
Fine Particles ◽  
Cementitious Materials ◽  
Cementitious Material ◽  
Mineral Admixtures ◽  
Material System ◽  
Cement Pastes ◽  
And Performance ◽  
Multiple Mineral ◽  
Ultra Fine Particles

This paper studies on the relative denseness of fresh cement pastes compounded with multi-cementitious materials and the performances of their harden concretes. Results show that with the dense packing of several ultra-fine particles, higher the relative denseness of different cementitious material system, higher the compressive strength and lower the air permeability of the harden concrete. The multi-cementitious material compounded by 37% cement、20% fly ash、40% pulverized slag and 3% silica fume has the higher relative denseness of fresh cement paste, and its compressive strength and air permeation of harden concrete composite is also improved.

Open-Air Storage Time Impact on Performance of PSP Used as Concrete Admixture

2010 ◽  
Vol 150-151 ◽  
pp. 1677-1682
Author(s):  
Yu Qiang Lin ◽  
Yan Shi ◽  
Jia Zheng Li ◽  
Hua Quan Yang
Keyword(s):  
Storage Time ◽  
Concrete Strength ◽  
Crystal Form ◽  
Cementitious Materials ◽  
Slag Powder ◽  
Open Storage ◽  
Strength Rating ◽  
Ignition Loss ◽  
The Impact ◽  
Long Storage

Paper studies on phosphorus slag powder(PSP) processed from phosphorus slag with different open-air storage time, analyses the changes in the performance of PSP and the impact on properties of cementitious materials. The results showed that with the growth of open storage time, vitreous structure of PSP would gradually be decomposed, part of the vitreous would transform into crystal form. Density of powder would diminish and ignition loss increase. Activity of PSP would slowly decreases, and the activity differences main reflected after 90d. Concerning on the point of concrete strength rating, 10 years phosphorus slag can still be used. The above provide a basis for resource utilization of phosphorus slag with long storage time.

scholarly journals Equivalent CO2 Emission and Cost Analysis of Green Self-Compacting Rubberized Concrete

2021 ◽  
Vol 14 (1) ◽  
pp. 137
Author(s):  
Sylvia E. Kelechi ◽  
Musa Adamu ◽  
Abubakar Mohammed ◽  
Ifeyinwa I. Obianyo ◽  
Yasser E. Ibrahim ◽  
...  
Keyword(s):  
Fly Ash ◽  
Co2 Emission ◽  
Calcium Carbide ◽  
Crumb Rubber ◽  
Cementitious Materials ◽  
Strength Properties ◽  
Cementitious Material ◽  
Ternary Blend ◽  
Fine Aggregate ◽  
Concrete Production

Global warming and climate changes are the major environmental challenges globally. With CO2 emission being one of the main greenhouse gases emitted to the environment, and cement and concrete production amounting to about 10% of the global CO2 emission, there is a need for the construction industry to utilize an environmentally sustainable material as an alternative to cement. This study analyzed the cost, CO2 emission and strength properties of green self-compacting concrete (SCC) ternary blend containing fly ash, calcium carbide residue (CCR), and crumb rubber (CR) as a replacement material by volume of cement, cementitious material, and fine aggregate, respectively. Cement was replaced with fly ash at 0 and 40% by volume. CCR was used as a replacement at 5 and 10% by volume of cementitious materials, CR replaced fine aggregate in proportions of 10 and 20% by volume. The result indicated that the mix with 0% fly ash and 20% CR replacement of fine aggregate was the most expensive and had the highest CO2 emission. However, the mix with 10% CR, 40% fly ash, and 10% CCR had the lowest CO2 emission and was therefore the greenest SCC mix. The 28-day maximum compressive strength of 45 MPa was achieved in a mix with 0% CR, 0% fly ash, and 10% CCR, while the utmost 28-day splitting tensile strength of 4.1 MPa was achieved with a mix with 10% CR, 0% fly ash, and 5% CCR, and the highest flexural strength at 28 days was 6.7 MPa and was also obtained in a mix with 0% CR, 0% fly ash, and 5% CCR. In conclusion, a green SCC can be produced by substituting 40% cement with fly ash, 10% fine aggregate with CR, and 10% CCR as a replacement by volume of cementitious material, which is highly affordable and has an acceptable strength as recommended for conventional SCC.

Cementitious Materials Usage in Self-Compacting Concrete: A Review

2015 ◽  
Vol 1113 ◽  
pp. 153-160 ◽  
Author(s):  
Ahmad Farhan Hamzah ◽  
Mohd Haziman Wan Ibrahim ◽  
Norwati Jamaluddin ◽  
Ramadhansyah Putra Jaya ◽  
Norul Ernida Zainal Abidin
Keyword(s):  
High Performance Concrete ◽  
Concrete Strength ◽  
Bottom Ash ◽  
Cementitious Materials ◽  
Energy Utilization ◽  
Supplementary Cementitious Materials ◽  
Mineral Admixtures ◽  
Self Compacting Concrete ◽  
Conventional Concrete ◽  
Materials Used

There are significant changes observed in concrete materials, the properties of innovated concrete have also experiencing revolutionize through hi-tech encroachment. Instead of new changes in the materials used in concrete making, the adjustment in concrete is started from conventional concrete strength and slowly tracked by high-strength concrete and high-performance concrete. Recently, the exploitation of by-products waste in the self-compacting concrete (SCC) had achieved massive interest among researchers due to practicable and beneficial features. Most of the prior works focused on SCC combining with supplementary cementitious materials such as fly ash, coal bottom ash, silica fume, ground granulated glass blast-furnace slag and rice husk ash. Concrete with these cementitious materials have been used extensively throughout the world. These materials used as mineral admixtures in concrete and strengthen the durability and concrete properties. The concrete applications are increasing with the passage of time due to their superior structural performance, environmental friendliness and low impact on energy utilization. Through these understanding, this research points out the idea of cementitious materials in concrete, especially SCC possess with numerous positive features such as durability, flowability and overall performance of concrete. It can be seen that cementitious materials have high benefit and lead to curing potential. However, it is important to understand that these materials are relatively expensive. Thus, this is a main reason behind their less adoption compared to add as mixtures in Portland cement.

Effect of ground granulated blast funrnace slag and fly ash on strength, permeability, and under-water abrasion of fine-grained concrete

2020 ◽  
Vol 71 (7) ◽  
pp. 775-788
Author(s):  
Quyet Truong Van ◽  
Sang Nguyen Thanh
Keyword(s):  
Fly Ash ◽  
Concrete Strength ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Chloride Permeability ◽  
Cement Replacement ◽  
Fine Grained ◽  
Granulated Blast Furnace Slag ◽  
Compressive Strength Test ◽  
Economic Ground

The utilisation of supplementary cementitious materials (SCMs) is widespread in the concrete industry because of the performance benefits and economic. Ground granulated blast furnace slag (GGBFS) and fly ash (FA) have been used as the SCMs in concrete for reducing the weight of cement and improving durability properties. In this study, GGBFS at different cement replacement ratios of 0%, 20%, 40% and 60% by weight were used in fine-grained concrete. The ternary binders containing GGBFS and FA at cement replacement ratio of 60% by weight have also evaluated. Flexural and compressive strength test, rapid chloride permeability test and under-water abrasion test were performed. Experimental results show that the increase in concrete strength with GGBFS contents from 20% to 40% but at a higher period of maturity (56 days and more). The chloride permeability the under-water abrasion reduced with the increasing cement replacement by GGBFS or a combination of GGBFS and FA

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