assessment of cement and concrete performance under sulfate attack

... of the steel (rust) tends to occupy much more volume, leading to spalling of concrete cover and section loss of rebar Due to the large quantity of RC bridges reaching this condition, repair and ... included: Class (prime candidate), Class (moderate candidate), and Class (low candidate Based on the proposed classification system, a Class candidate bridge was chosen and Phase II of the project was ... effort to understand how PennDOT’s load rating and analysis program (BAR7) worked Phase III includes the implementation of the FRP strengthening system and poststrengthening load testing and assessment...

Ngày tải lên: 12/05/2017, 22:36

... content of esterified and etherified p-coumaric acids is 3.78 and 1.72% respectively, and the content of esterified and etherified ferulic acid is 1.02 and 2.2%, respectively [23] Dimerization of ... economic, and energetic costs and benefits of biodiesel and ethanol biofuels PNAS 2006, 103(30), 11206-11210 [6] Taherzadeh M.J., Kamiri K Pretreatment of lignocellulosic wastes to improve ethanol and ... conversion of lime-treated wheat straw into bioethanol: quality assessment of bioethanol and valorization of side streams by anaerobic digestion and combustion Biotechnology for Biofuels 2008,...

Ngày tải lên: 05/09/2013, 15:28

... assays with increasing amounts of DNA fragments encoding cyt b5 and monitored the formation of androstadienol and DHEA As shown in Fig the stimulation of DHEA and androstadienol production from ... transformation of preg into androstadienol, a precursor in the biosynthesis of 1354 P Soucy et al (Eur J Biochem 270) Fig Influence of increasing amounts of P450red on the relative formation of DHEA and androstadienol ... also in the production of androstadienol which is considered to be an intermediate in the 16-androstene pathway leading to the biosynthesis of androstenol and of 5a(16)androsten-3-one, a pheromonally...

Ngày tải lên: 08/03/2014, 08:20

... portland -cement concrete, the binder is a mixture of portland cement and water, with or without admixtures concrete, aerated—see concrete, foamed and concrete, cellular concrete, aluminate concrete ... volume of concrete, mortar, or grout cement factor—see cement content (preferred term) cement gel—see gel, cement cement gun—see gun, cement cement kiln—see kiln, cement cement paint—see paint, cement ... burning process; CEMENT AND CONCRETE TERMINOLOGY 116R-11 cement cement, expansive, Type M—interground or blended mixtures of portland cement, calcium-aluminate cement, and calcium sulfate suitably...

Ngày tải lên: 16/03/2014, 01:20

... (2002)’s database of coherenceannotated texts 3.1.2 Kinds of coherence relations We assume a set of coherence relations that is similar to that of Hobbs (1985) Below are examples of each coherence ... The first method consists of simply determining the in-degree of each node in the graph A node represents a sentence, and the in-degree of a node represents the number of sentences that relate ... their participation All were native speakers of English and were naïve as to the purpose of the study (i.e none of the subjects was familiar with theories of coherence in natural language, for example)...

Ngày tải lên: 17/03/2014, 06:20

... analysis of IVS2 +691C/G SNP M: marker 1kb; Lane 1, and 7: homozygote CC; lane and 4: GG; lane and 5: heterozygote C/G From that, we calculated allele frequencies of +691C and +691G as 0.75 and 0.25, ... binding and activity Proceedings of the National Academy of Sciences USA 95 (1998) 9608 233 [5] Paul Roy Heath et a.l, Allenle of Human histamine H2 receptor and methods of detection of H2 receptor ... to Assoc Prof Trinh Dinh Dat from Faculty of Biology, Hanoi University of Science, for his continuing expertise support and proof-reading the manuscript D.D Long et al / VNU Journal of Science,...

Ngày tải lên: 22/03/2014, 09:20

... Standards and Health: Assessment of risk and risk management for water-related infectious disease This page intentionally left blank Water Quality Guidelines, Standards and Health: Assessment of ... exposure assessment is an important input to both the assessment of risk and to risk management Exposure assessment is a formal component of the risk assessment process (Chapter 8) Exposure assessment ... Harmonised assessment of risk and risk management: an overview 11 While the general public may prefer the idea of 'zero risk', in a world of limited resources and competing demands some idea of tolerable...

Ngày tải lên: 28/03/2014, 23:20

... history and context of five key areas of inquiry of this study: the place, product, people, politics, and programs (the 5P‟s); followed by a brief summary of previous allegations of human and labor ... history and development of the rubber sector in the country, and the impact of severe poverty and social and economic instability on the labor force and employment patterns The civil war and subsequent ... Exploratory Assessment of Living and Working Conditions, with Special Attention to Forced Labor 11 Tapping rubber trees The clearing of land, breeding in the nursery, and the weeding and pruning of fields...

Ngày tải lên: 31/03/2014, 09:21

... the cement, but rather the aggregate (i.e sand and rock) portion of concrete However fly ash is used as a cement replacement in concrete, and the nonenergy emissions of the replaced virgin cement ... Comparison of Recycling, Landfilling, and Incineration: A Review of Recent Studies”; Annual Review of Energy and the Environment 21:6:191-237 32 Microsoft Excel and Web-based versions of this tool ... of action by EPA • 1.4 The landfill recovery scenario is based on estimated recovery rates and percentages of waste disposed in landfills with no recovery, landfills with only flaring, and landfills...

Ngày tải lên: 31/03/2014, 13:20

... Role of Assessor: An assessor is a person who is assigned the job of assessing a candidate’s performance in any of the skills that is to be assessed For the purpose of the Summative Assessment, ... record the candidates’ performance in the MP players/ recorders, so as to validate and make the test reliable and fair Assessment of Speaking Assessors should familiarise themselves with the assessment ... comprises of a variety of task These tasks are graded according to the length of the task and the difficulty level Schools may download the sample tasks and reorganize them in two parts transcripts and...

Ngày tải lên: 02/04/2014, 05:20

... The loss of tolerance to the presence of sodium chloride is attributed to loss of osmotic functionality and/ or integrity of the cytoplasmic membrane, whereas cells become sensitized and thus, ... 3rd, and 4th log cycle of inactivation, respectively; and are deduced from the regression line of their corresponding DRT curves To fit the model to the experimental data and to calculate d and ... the lethality of the process would only be caused by the effect of ultrasound, and above 45  C, the lethality of the process would result from the combination of the lethality of both technologies...

Ngày tải lên: 05/05/2014, 08:43

... Programme officers in the development of new projects The participation of civil society, government, and business stakeholders in the diagnosis of environment and health problems and in the design and ... development of computational technologies, land use trends and impacts analyses, and socio-economic aspects of environmental and natural resource conservation and management Dr Gitau received her B.S and ... of well-being, and takes into account the multiple goals and multiple perspectives of the primary managers of these systems Issues of human values (such as economics and aesthetics), scale, and...

Ngày tải lên: 18/06/2014, 19:20

... sum of the cross products of cumulative percentage of land-use units and lagged cumulative percentage of the resource T2 is the sum of the cross products of lagged cumulative percentage of land-use ... proportion of land under various crops in the six ISSs based on the 1997 census of land-use units For each village, the proportion of land under each enterprise was calculated as the average of the ... boundaries of Gikabu-naButi village of Tigoni Division are socioeconomic The village adjoins another, and both are sandwiched within two vast tea estates The land was part of one of the tea estates and...

Ngày tải lên: 18/06/2014, 19:20

... production and agroforestry Tour of fields Livestock production Tour of pens and sheds Marketing End of tour of fields, pens, and sheds End of tour of fields, pens, and sheds Beginning of discussion ... of the agenda of the workshop, a description of the steps of an action research process and of the objectives and proposed methods of the project was provided Table 3.1 shows the sequencing of ... strategies Graphs of trends and time lines Graphs Graphs of transect profiles showing resource location and land-use characteristics Lists of income and expenditure types Key inputs and outputs Venn...

Ngày tải lên: 18/06/2014, 19:20

... 1976), (4) assessment of stability (Roberts, 1976a), (5) calculation of the strong components, (6) assessment of connectedness (Roberts, 1976b), and (7) assessment of the effects of different ... [3, 12] and [12, 3] Increases in the weight of any one of these arcs increase the number of oscillating impacts of community goals A weight of 10 resulted in oscillations of all but nine of the ... Integrated Assessment of Health and Sustainability of Agroecosystems Klee, V (1989) Sign-pattern and stability In Applications of Combinatorics and Graph Theory to the Biological and Social Sciences...

Ngày tải lên: 18/06/2014, 19:20

... Agroecosystem health project Integrated Assessment of Health and Sustainability of Agroecosystems TABLE 5.2 Activities, Measures of Performance, and Targets Negotiated and Agreed On to Resolve Four Problem ... 80% of households Soft System Methodology in the Management of Agroecosystems Measures of performance and their ranges 141 © 2009 by Taylor & Francis Group, LLC 142 Integrated Assessment of Health ... bounding of a problem situation and the concept of a system’s boundary in soft systems methodology Journal of Applied Systems Analysis 16: 35–41 Checkland, P., and Scholes, J (1990) Soft Systems...

Ngày tải lên: 18/06/2014, 19:20

... Head of cattle/available labor Heads of cattle per acre Off-farm employment rate Proportion of farmland rented Proportion of land under beans Proportion of land under kale Proportion of land under ... the definition and conceptualization of ecosystem health Identify ecosystem health attributes Definitions of monitoring and evaluation Understanding of indicators Understanding of ecosystem health ... 160 Integrated Assessment of Health and Sustainability of Agroecosystems TABLE 6.3 Attributes, Categories, and Number of Researcher-Proposed Indicators of Health and Sustainability of the Kiambu...

Ngày tải lên: 18/06/2014, 19:20

... Inadequate security 3 3 3 Lack of artificial insemination Lack of market and shopping center 3 0 0 Lack of nursery schools Lack of organization and unity Lack of secondary school and polytechnic 0 Low ... twofold: (1) the incorporation of targets and thresholds in the process of categorizing the indicators, thus providing an intuitive interpretation, and (2) projection of data from the initial and ... effectiveness, vigor, and productivity Predictions on the long-term sustainability and health of the systems rely on an analysis of spatial and temporal trends of the indicators (Rapport and Regier, 1980;...

Ngày tải lên: 18/06/2014, 19:20

... existence of monitoring and control subunits within the holon, which in turn implies the existence of at least one measure of performance, a criterion of what constitutes good or bad performance, and ... Integrated Assessment of Health and Sustainability of Agroecosystems Although, on average, income for a household was low, many of the households had diverse sources of income, including off-farm ... education/knowledge/skills and access to off-farm employment, they did not appreciate the value of off-farm employment as resulting in increasing community contact with the outside world and as a source of knowledge and...

Ngày tải lên: 18/06/2014, 19:20

... Integrated Assessment of Health and Sustainability of Agroecosystems Technical improvements, such as geographical information systems and remote sensing, self-reporting systems, and automated and integrated ... the incorporation of targets and thresholds in the process of categorizing the indicators, thus providing an intuitive interpretation, and (2) projection of data from the initial and subsequent ... information Because communities often lack the capacity to develop and measure quantitative indicators, while researchers and policymakers lack the knowledge and mandate to make value-based judgments,...

Ngày tải lên: 18/06/2014, 19:20