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It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please [email protected]. Recommended Citation Dopko, Michael, "Fiber reinforced concrete: Tailoring composite properties with discrete fibers" (2018).Graduate Theses and
Concrete is the most versatile, indispensable and widely used building material, of which cement is an integral constituent. From the time immemorial Portland cement has been used as binder in concrete construction. However, the production of the cement is not eco-friendly and consumes enormous amount of energy which ultimately leads to the depletion of the fossil fuel reserve.
TY - THES. T1 - Hydration of slag cement: theory, modeling and application. AU - Chen, Wei. PY - 2006. Y1 - 2006. KW - IR-57703. M3 - PhD Thesis - Research UT, graduation UT
4.3.7 Charge passed and conductivity of concrete 94 4.3.8 Apparent diffusion coefficient 99 4.3.9 Interrelationship between strength, sorptivity, and conductivity 102 4.4 Summary 105 5 MICROSTRUCTURE STUDY OF ALKALI ACTIVATED SLAG AND FLY ASH-BASED GEOPOLYMER CONCRETE 108 5.1 SEM and EDAX Analysis of AAS concrete 108
The environmental concerns related to the production of cement in terms of the energy consumption and the emission of CO2 lead to the search for more environmentally viable alternatives to cement. One of those alternative materials is alkali-activated slag (AAS) where ground granulated blast furnace slag is used not as a partial replacement to cement but as the sole binder in the production of ...
The result of acidity is a gradual decomposition of hydration cement products followed by degradation of mechanical properties of concrete. The objective of this paper is to study the acid resistance of slag cement activated by silica fume alkali activator.
Topics in Cement and Concrete Research In recent decades, the construction sector has faced many changes. One of these ... compositions of the unhydrated slag-blended cement, i.e. the mineral compositions of the slag and Portland cement clinker, and their blending proportions, with the quantities ...
Self Compacting Concrete. Self-compacting concrete (SCC) is a special type of concrete which can be placed and consolidated under its own weight without any vibration effort due to its excellent deformability, and which at the same time is cohesive enough to .
Slag Cement. Slag cements are resistant to sea water only with an addition of >60% slag if the OPC is a non-marine cement.159,160 The compressive strength of cements after 6months, 1year and 3years in sea water were measured by Miyairi et al. From: Lea's Chemistry of Cement and Concrete (Fifth Edition), 2019. Related terms: Blast Furnace Slag
Construction industry uses Portland cement which is known to be a heavy contributor to the CO2 emissions and environmental damage. Incorporation of industrial wastes like demolished old concrete, silica fume (SF) and fly ash (FA) as supplementary cementing materials (SCMs) could result in a substantial reduction of the overall CO2 footprint of the final concrete product.
The influence of slag content on Compressive strength, Split tensile strength and Flexural strength of High volumes of slag concrete (Cement : GGBFS is 50:50) specimens of different water-binder ...
Compared to PC, the slower strength development in PC-Slag cement resulted in smaller autogenous shrinkage reduction. Drying shrinkage reduction was observed at an early age in both PC and PC-Slag unrestrained cement paste containing the MgOs at water-to-bonder (w/b) ratio of 0.5, although the long-term shrinkage was higher than the control.
The present paper focuses on investigating characteristics of M20 and M40 grade concrete with partial replacement of cement with ground granulated blast furnace slag (GGBS) by replacing cement via ...
cement hydration, significant for various concrete applications such as mass, hot-weather, and cold-weather concreting. The heat of hydration and rate of heat liberation of cement pastes, and concrete made with it, depend heavily on the chemical composition, fineness, and mineral admixture content of the cement .
tive model of the strength of concrete as a function of the amount of seven different ingredients (cement, slag, fly ash, water, plasticizer, coarse aggregate and fine aggre- gate),andtheageoftheconcrete(Yeh,1998).
An interesting paper by Bakharev et al. (2000) tried to rationalize the study of workability of concrete that incorporated alkali-activated slag as the only binder. The activators were liquid sodium silicates (4 ± 7% Na, mass of slag) and a multicompound activator (NaOH + Na 2 CO 3) (8% Na, mass of slag).To ameliorate the workability, measured by the slump loss test, different additives have ...
Cement for their generosity and supply of all concrete constituent materials used for this study. I would like to thank the PhD examination committee members, Professor K. Riding, Professor D. Panesar, Professor K. Peterson, and Professor F. Azhari for their comments.
cementitious materials (cement, fly ash, silica fume, slag), and shrinkage reducing admixture (SRA) are evaluated. A series of concrete shrinkage and mechanical property tests are performed. The outcomes of this study identify optimum concrete mix designs as appropriate
Feb 21, 2020· Explore Green Concrete with Free Download of Seminar Report and PPT in PDF and DOC Format. Also Explore the Seminar Topics Paper on Green Concrete with Abstract or Synopsis, Documentation on Advantages and Disadvantages, Base Paper Presentation Slides for IEEE Final Year Civil Engineering CE or IEEE Civil Construction BTech, BE, MTech Students for the year 2015 2016.
Aug 16, 2007· Slag cement is a wonderful material to work with, from 4,000 psi concrete to 15,000 psi concrete. I've used 50% in 13,000 psi concrete and it works beautifully. Don't be afraid to use 30% or 40%, you won't be sorry.
SCIC #11, Slag Cement and Fly Ash, compares the two materials, explaining that while chemical similarities exist between them, they exert different influences in concrete applications. Slag cement is a hydraulic cement while fly ash is a pozzolan. This information sheet lists the properties slag cement can bring to concrete in both plastic and ...
The effect of very fine aggregate on the water requirement and strength evolution of superplasticized concrete was studied. The maximum aggregate size was 6 mm, fine aggregate content 0–15% of the total aggregate, binder (OPC and silica) content 80–800 kg m−3, and specific surface area of the finest aggregate material 18–1000 m2 kg−1.
Vivek Bindiganavile, Meghdad Hoseini, in Developments in the Formulation and Reinforcement of Concrete (Second Edition), 2019. 16.3.1 Portland cement. Portland cement is the main cementitious component of ed concrete. It has been used at dosages varying from as high as 1400 kg/m 3 to as low as 75 kg/m 3 but in practice, usually between 300 and 500 kg/m 3 (ACI 523.1R-06, 2006; British ...
ufactured cement and the ability of concrete made from them to resist sea water action. Sea water may be used in mixing plain concrete but rein forced concrete above high water level should be mixed with fresh water. The only effect noticeable in using sea water for plain concrete mixing is the increased laitance which forms consisting
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