1 edition of Influence of alum and soap solutions of the permeability of concrete found in the catalog.
Influence of alum and soap solutions of the permeability of concrete
Myron Kendall Jordan
Written in English
|Statement||by Myron Kendall Jordan|
|The Physical Object|
|Pagination||25 leaves :|
|Number of Pages||25|
permeameter used to determine permeability of porous concrete specimens 3. Test results and discussions Results of the study performed to evaluate the influence of the shape of aggregate measured in terms of its angularity number on permeability of pervious concrete is presented in Table 3. Influence of early curing on the sub-surface permeability and strength of silica fume concrete Authors: S. A. Austin, P. J. Robins Source: Magazine of Concrete Research, Vol Issue , 1 Mar (23–34)Cited by:
Concrete Permeability. Permeability is a measure of how easy it is for water, air and other substances such as chloride ions to enter concrete. Concrete contains pores that allow these substances to enter. Larger pores allow easier entry, while smaller pores decrease the rate at which these substances enter the concrete. Materials and Structures/Matériaux et Constructions, Vol. 32, April , pp 1. SCOPE The present draft standard describes a standard method to precondition separately cast concrete test specimens for the measurement of the gas permeability as .
• A means of supplying de-aired water to the top surface of the concrete specimen contained within the permeameter cell at a constant pressure head of up to kPa. MAIN ROADS Western Australia Water Permeability of Hardened Concrete Page 1 of 7 T\ Test Method 71/10/ Issue 1 10/98File Size: KB. PERMEABILITY STUDY OF CRACKED CONCRETE Kejin Wang, Daniel C. Jansen, Surendra P. Shah The NSF Center for Advanced Cement-Based Materials Northwestern University, Sheridan Rd., Evanston, Illinois , USA Alan F. Karr National Institute of Statistical Sciences PO Box 14 , Research Triangle Park.
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Influencjeofalumais^dsoapsolutions ojn^thepermeabilityofconcrete MYRONKENDALLJORDAN THESIS FORTHK DEGREEOFBACHELOROFSCIENCE IN CIVILENGINEERmC INTHK COLLEGEOFE]S^G1:NEEI11NG UNIVEKSITYOFJLLIXOIS PRESENTI5D,JUNE Influence of alum and soap solutions of the permeability of concrete By Myron Kendall Jordan Get PDF (3 MB)Author: Myron Kendall Jordan.
Factors Influencing Concrete Permeability. There are three major factors that influence the permeability of concrete: 1. Water to Cement ratio. Water to cement ratio influences concrete permeability to a great extent. The higher the w/c ratio the greater the concrete permeability. The presence of capillary pores and air voids influences concrete permeability to a large extent.
Concrete density is inversely proportional to its porosity. The ingress of aggressive agents into the pore structure is responsible for various durability problems in concrete structures.
Therefore, a durable concrete should have low permeability. Permeability of concrete increases with the increase in porosity of Size: KB. The influence of the permeability of concrete cover on reinforcement corrosion Article in Magazine of Concrete Research 53(3) January with 60 Reads How we measure 'reads'.
The addition of alum resulted in the formation of additional ettringite and enabled the concrete to set, which is confirmed through powder XRD.
ride solution, rapid chloride perm e - a b i l i t y, helium poro s i t y, and vo l u m e of permeable vo i d s. W/C ratio and curing strongly influence concrete permeability The results of the study con-f i r med that w/c ratio strongly influ-ences the permeability of concre t e.
Pe r meability of concrete to water. Control of Concrete Mixtures(Kosmatka et al. ) for further information. Effects of Substances on Concrete and Guide to Protective Treatments CONCRETE TECHNOLOGY by Beatrix Kerkhoff Fig. Aggressive substances can compromise the durability of concrete.
Shown are concrete beams exposed to high-concentration sulfate soils/ Size: 1MB. Permeability of concrete is defined as the property that controls the rate of flow of fluids into a porous solid.
It largely depends on the size of pores, connectivity of pores, and how tortuous the path is for the permeating fluid. The pores relevant to permeability are those with a minimum diameter of or [ ]Author: Madeh Izat Hamakareem.
effect of carbonation on permeability and on porosity which has a significant influence on most of the transport properties. The Carbonation Process.
Carbonation of concrete is traditionally defined  as the chemical reaction between atmospheric carbon dioxide and the products of cement hydration particularly Ca(OH) 2. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.
Thus the early standard curing is very important for concrete with high volume mineral admixtures, and has important influence on the hydration of binders and micro-pores of concrete, and especially the influence on the pore structure of concrete surface is very by: relative humidity, covered concrete, a concrete with an exposed vertical surface, a concrete on a drainable base, a concrete on a non-drainable base, and concrete that was submerged.
The samples showed that for practical field samples the relative humidity in the concrete was always above 80% for the samples by: Assuming laminar flow, permeability can be calcu- lated using Darcy's equation: Q = K/ where Q = volume of fluid flowing in unit time K = permeability of the medium = viscosity of the fluid dP/dZ = pressure gradient J.P.
Olfivie~ and M. Massat Vol. 22, Nos. 2/3 The permeability of concrete is a function of its pore structure Cited by: Concrete permeability was measured on cores according to ASTM CStandard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration.
Information from the concrete mix designs was then used along with the aggregate gradations. Permeability is important because: The penetration of some aggresive solution may result in leaching out of Ca(OH)2 which adversely affects the durability of concrete.
In R/C ingress of moisture of air into concrete causes corrosion of reinforcement and results in the volume expansion of steel bars, consequently causing cracks & spalling of. Durability and Permeability of Concrete 1. Durability and Permeability of Concrete Unit-5 2. Syllabus • Durability and permeability of concrete: Definitions, causes, carbonation, cracking.
Durability • Durability is the ability to last a long time without significant deterioration. The chemical interaction between calcium chloride (CaCl 2) and cementitious binder may alter the transport properties of concrete which are important in predicting the service life of infrastructure elements.
This paper presents a series of fluid and gas transport measurements made on cementitious mortars before and after exposure to various solutions with concentrations ranging from 0% Cited by: permeability. PERMEABLE CONCRETE SYSTEMS There are three typical best practice systems 5 that can be employed in the construction of a permeable solution.
All of these systems can be easily adapted to create a permeable concrete based solution and are described as follows: Permeable aggregate sub-base Undisturbed low permeability soil permeable.
The American Concrete Institute. Founded in and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete Cited by: 2.
Permeability refers to the amount of water migration through concrete when the water is under pressure, and also to the ability of concrete to resist penetration of any substance, be it a liquid, gas, or chloride ion. Today there is renewed interest in the permeability of concrete.
The durability of concrete structures is mainly affected by the transport of gaseous and liquid substances through its pore system which can potentially cause deterioration of the concrete. Thus, an important indicator of long-term durability is the relative ease with which each aggressive substance is transported through the concrete, in other words, its by: optimizing the strength and permeability of pervious concrete.
ryerson university. department of civil engineering. amanda lidia alaicaa. mahsa heidari dolatabadib. anto sucic. c. dr. medhat shehata. d. paper prepared for presentation at the. permeable pavement design and technology session. of the annual conference of theFile Size: 1MB.