slag in concrete is found., (2016) [9], in their paper entitled "Replacement of Fine Aggregate by Steel Slag". In this research paper M30 concrete with high volume steel slag replacement for fine aggregate is studied to examine the changes in properties of compressive strength, flexural strength and split tensile strength. After comparison with conventional concrete ...
Ke ywords: radioactivit, addition, cement, concrete admixtures, exhalation, difussion. s 2 1. INTRODUCTION The purpose of this thesis is to highlight the features of building materials used in the radon transport. Considering that, of all building materials, concrete seems to contribute best to the increase of contained radon concentration, this thesis presents the influence of concrete ...
Nowadays, concrete is the most widely used construction material which mainly consists of Portland cement, aggregate and water. For more than 200 years, concrete has been known as a durable and high strength construction material while its formability during its fresh stage results in building different shapes which are otherwise not possible.
Slag cement is a recovered byproduct of the iron manufacturing process and can be used to replace a portion of portland cement in concrete mix design. The use of slag cement has demonstrated longterm performance enhancements allowing designers to reduce the environmental footprint of concrete while ensuring improved performance and increased durability.
The Influence of Steel Slag as Alternative Aggregate in Permeable Concrete Pavement A A G Nadiatul Adilah 1, S Y Ayman Mohammed, P J Ramadhansyah, O Rokiah1 and M R Hainin2. 1Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, 26300 Kuantan, Pahang, Malaysia . 2Faculty of Engineering, School of Civil Engineering, Universiti Teknologi Malaysia, 81310
In this thesis, autogenous deformation of cement pastes, Normal Weight Concrete (NWC), and Lightweight Aggregate Concrete (LWAC) were measured. Both Portland and Blast Furnace Slag (BFS) cement were studied. A model for calculating selfdesicion shrinkage of cement paste was proposed and validated with experiments.
ASR poses a threat to concrete stability particularly in cases where the formation of cracks leads to a loss in the mechanical performance and properties of the concrete. The addition of supplementary cementitious materials (SCMs) such as fly ash and slag for the partial replacement of Portland cement in concrete is considered to be the most economical option in mitigating the occurrence of ...
However, one of the main constituent of concrete, namely clinker which is responsible for high CO2 emissions in the atmosphere from cement manufacture, can be partially substituted by additions: limestone filler (LF), fly ash (FA) and granulated blastfurnace slag (BFS), which are byproducts of various industries. In addition to saving energy and preserving natural resources through the ...
Concrete made of coarse cement may have higher potential of autogenous selfhealing than that made of fine cement. This is because in the concrete made of coarse cement there is more unhydrated cement left and the more porous microstructure favors the diffusion of ions from the bulk paste into the crack for the formation of reaction products in the crack.
01/03/2013 · Addition of slag modifies the hydration process of cement and the evolution of the mechanical properties of concrete. In this study, the advancement of hydration was monitored for concretes with different blastfurnace slag contents using several techniques such as adiabatic calorimetry, thermogravimetry and analysis by scanning electron microscopy.
PhD Metadata Show full item record ... Abstract. The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Most of this by ...
Doctoral Thesis in Civil and Architectural Engineering Reducing adon as Eissions in Concrete ... the Swedish Cement and Concrete Research Institute ( Jan Trägårdh ) and department of R adiation Physics, Sahlgren ... concrete recipe containing CEM I as a binder combined with slag or fly ash, the radon exhalation rate increased ...
Slag Cement Concrete Thesis Phd Pdf Studies on concrete degradation in aggressive The concretes under investigation contain portland limestone cement, blast furnace slag cement, sulphates resistance pozzolanic cement with or without silica fume, respectively, at constant water/cement ratio (w/c ), and two type of aggregates, limestone
03/02/2021 · Alkaliactivated slag concrete with paper industry waste. Maria Mavroulidou, Division of Civil and Building Services Engineering, School of the Built Environment and Architecture, London South Bank University, 103 Borough Road, London SE1 0AA, UK. Email: mavroum
slag cements had higher values than the separately ground Portland slag cements. However, for the Blaine fineness values of 4500 cm 2/g, separately ground Portland slag cement specimens had slightly higher 2, 7, 28, and 90day compressive strength values than the interground ones.
This thesis describes an investigation of the various properties of cement paste and concrete mixes incorporating slag as an ordinary Portland cement (OPC) replacement material. Two types of slag were used; a noncommercial aircooled Electric Arc Furnace Steel Slag produced in Libya (LSS) and a widely used Ground Granulated Blastfurnace Slag (GGBS).
The challenge is, however, to investigate if this material can promise durability performance as good as, or even better than, Portland cement based concrete. Thus, this thesis analyzes the response of alkaliactivated binders based on slag and fly ash to a range of exposure environments. The knowledge of microstructural development of ...
