concrete quality mixing and placing

... Morrison, G and Greenwood, R (2005) Trends Anal Chem., 24(10), 845–868. Trang 6Biosensors and Biological Monitoring for Assessing Water Quality Carmen Rebollo, Juan Azc´arate and Yolanda Madrid ... uses and the obligation of wastewater treatment to achieve a degree of performance and effluent quality This quality control has to be carried out as analytical measurements rOperation and maintenance ... (1986) Water quality – Determination of ammonium – Part 2: Automated spectrometric method. ISO 11732 (1997) Water quality – Determination of ammonium nitrogen by flow analysis (CFA and FIA) and spectrometric

Ngày tải lên: 19/06/2014, 16:20

... Gorton, L and Emmneus, J (2002) Anal Chim Acta, 456, 3–17. P´erez, F., Tryland, I., Mascini, M and Fiksdal, L (2001) Anal Chim Acta, 427, 149. Trang 2Philip, J., Balmand, S., Hajto, E and Bailey, ... field conditions and development of a ro-bust and portable instrumentation is a priority to include biosensors and other contin-uous analytical systems in biomonitoring of water and to help to ... affecting the organoleptic quality of the resulting drinking water Impacts are both direct and indirect, through degradation products, causing acute and/or chronic tox-icity and/or long-term effects

Ngày tải lên: 19/06/2014, 16:20

... turbulence, and resist entanglement with floating matter 2.2.1.5 Quality Assurance and Quality Control For any flow monitoring, but particularly for sewer flow, detailed quality assurance and quality ... data for calibration and verification of numerical models (Baughen and Eadon, 1983) (6) Identify inflow and infiltration (I/I) problems (7) Performance evaluations of pumps and hydraulic structures ... construction and installation costs Drake (1994) further suggested that the equipment must provide reliable and accurate level and/or flow measurements within dynamic conditions, withstand a corrosive

Ngày tải lên: 19/06/2014, 16:20

... Brown, L.C and Barnwell T.O (1987) The Enhanced Stream Water Quality Models QUAL2E and QUAL2E-UNCAS: Documentation and User Model EPA/600/3-87/007, USA. Janssen, P.H.M., Heuberger, P.S.C and Sanders, ... Srinivasan, R and King, K.W (1996) SWAT Manual USDA, Agri-cultural Research Service and Blackland Research Center, Texas. Barthelemy, P.A and Vidal, C (1999) A dynamic European agricultural and agri-foodstuff ... Package for Sensitivity and Uncertainty Analysis Bilthoven, The Netherlands. Krysanova, V and Haberlandt, U (2001) Ecol Modelling, 150, 255–275. McKay, M.D (1988) Sensitivity and uncertainty analysis

Ngày tải lên: 19/06/2014, 16:20

... system and reaching munic-ipal wastewater treatment plants (WWTPs) derive princmunic-ipally from human activities Wastewater Quality Monitoring and Treatment Edited by P Quevauviller, O Thomas and ... Trang 2and in particular from domestic sources, industrial districts and urban run-off rain-water A very large amount of different organic and inorganic compounds, estimated as several thousand, ... biodegradable and nonbiodegradable fractions and into an active biomass fraction A soluble part (S) and a particulate part (X) are distinguished for both biodegradable COD (indicated by subscript S) and

Ngày tải lên: 19/06/2014, 16:20

... more complex and sophisticated monitoring This causes considerable additional effort and expense to obtain a high degree of knowledge about the type and the concentrations of pollutants and micropollutants ... general a good characterization of COD and N in the influent wastewater is very important to understand the fate of these components in WWTPs and to predict the quality of the effluent wastewater ... specialized laboratories and, sometimes, the lack of unified and standardized methodologies Furthermore, the limitation in the evaluation of the fate of organic micropollutants and potentially toxic

Ngày tải lên: 19/06/2014, 16:20

... of the whole sample and on aliquots of the sample previously filtered through membrane filters of 0.45 and 0.2 μm nominal pore size (Standards Australia and Standards New Zealand, 1998) or glass ... are chemical elements and compounds found in the environment that plants and animals need to grow and survive For water-quality investigations the various forms of nitrogen and phosphorus are the ... of algae and the dissolution of phosphate minerals, from anthropogenic point source discharges of sewage and industrial effluents and from diffuse inputs from grazing and agricultural land Studies

Ngày tải lên: 19/06/2014, 16:20

... (APHA-AWWA-WPCF). Standards Australia and Standards New Zealand (1998) Australian/New Zealand, Water Quality-Sampling Part 1: Guidance on the Design of Sampling Programs, Sampling Techniques and the Preservation ... nitrate, phosphate and sulfate in water and wastewaters In wastewater analysis the only pretreatment of the sample consists in its filtration through 0.45 μm membranes and NO−3, NO−2 and PO3−4 contents ... PO3−4 and SO2−4 in wastewaters by SIC using a Metrosep Anion Dual 2 column, and a mixture of NaHCO3 and Na2CO3 as eluent, in combination with a sample pretreatment in an on-line dialysis unit and

Ngày tải lên: 19/06/2014, 16:20

... medium and the environment, r (x) ∈  p, the reac-tion rates and K ∈  n ×p, a constant pseudo-stoichiometric coefficient matrix In this representation, K r (x) stands for the biological and biochemical ... biomass X t (Andrews, 1968): k t S t −−−−→ Xt μt(.)Xt + kmCH4 where k t and k m are the yield coefficients associated with COD degradation and methane production, respectively;μ t(·) stands for bacterial ... Bioengng., 10:707–723. Bastin, G and Dochain, D (1990) On-line Estimation and Adaptive Control of Bioreactors. Elsevier, Amsterdam, The Netherlands. Bernard, O and Gouz´e, J L (2004) Closed loop

Ngày tải lên: 19/06/2014, 16:20

... aquatic ecosystems is, on the one hand, acute toxicity depending on concentration and pH (see Chapter 2.1), and on the other hand, chronic toxicity regarding fishes and benthic invertebrate populations ... Reddersen, K and Mechlinski, A (2002) Water Sci Technol., 46(3), 81–88 Hejzlar, J and Chudoba, J (1986) Water Res., 20(10), 1209–1216. Hernando, M D., Fernandez-Alba, A R., Taulera, R and Barcelo, ... [biological oxygen demand (BOD), chemical oxygen demand (COD), total organic carbon (TOC), total suspended solids (TSS), N forms and P forms] The minimum requirements for discharges quality, accord-ing

Ngày tải lên: 19/06/2014, 16:20

... frequency, the number of samples and the period of the year for sampling The sampling time step was allowed to vary between 1 h and 2 days; the minimum number of samples is 1 and the maximum number is ... large number of samples (Figure 5.2.3b) and a large period, mainly spring and summer months (data not shown) A sample every hour, starting in February and ending on 30 August, representing a ... bounds on 22 February, sampling schemes 1 (a) and 2 (b) great importance for some costly and time-consuming analysis of samples, e.g for pesticide modelling and monitoring By extending the OED method

Ngày tải lên: 19/06/2014, 16:20

... one hand, and to ensure that operation and maintenance is practised in a safe and responsible manner, on the other The experience in Australia, at Sydney Olympic Park (Listowski, 2004) and at ... tolerate some water quality that is below normal standards The water quality parameters most commonly monitored in wastewater treatment plant effluent and water reuse schemes and their frequency ... con-straints given by regulations and case-by-case permits cannot be overcome with respect to the demanded water quality parameters and sampling frequencies Water quality control might be appropriate

Ngày tải lên: 19/06/2014, 16:20

... by hot -mixing sulfur cements and mineral aggregates Sulfur concrete solidifies and gains strength rapidly upon cooling As with other concrete materials, such as portland cement concrete and asphaltic ... manufacturers, and users with sulfur concrete and its applications and to assist them in selecting proper materials, mixture proportions, and properties for optimum use of sulfur concrete Sulfur concrete ... placement, and finishing of the sulfur concrete before solidification Equipment and techniques from both the concrete and asphalt technologies are used to batch, transport, place, and finish sulfur concrete...

Ngày tải lên: 24/10/2014, 22:11

... methods of placing concrete MEASURING, MIXING, TRANSPORTING, AND PLACING CONCRETE 5.2—Planning A basic requirement in all concrete handling is that both quality and uniformity of the concrete, ... 304.3R Heavyweight Concrete: Measuring, Mixing, Transporting and Placing 304.4R Placing Concrete with Belt Conveyors 304.5R Batching, Mixing, and Job Control of Lightweight Concrete 304.6R Guide ... results in measuring and mixing ingredients for concrete, transporting it to the site, and placing it The first six chapters are general and apply to all types of projects and concrete The following...

Ngày tải lên: 24/10/2014, 15:47

... increases The quality of high-strength concrete is controlled by the quality and uniformity of the ingredients, and by the mixing, placing, and curing conditions A high level of quality control ... Measuring, Mixing, Transporting and Placing Concrete Standard Practice for Curing Concrete Guide for Consolidation of Concrete Guide for Concrete Inspection Building Code Requirements for Structural Concrete ... planned placing conditions and procedures, and review the planned inspection and testing programs of the various parties The effects on the concrete of time, temperature, placing, consolidation, and...

Ngày tải lên: 24/10/2014, 21:59

... engine performance The air-fuel ratio and the specific fuel consumption are measured and determined With the optimized manifold, both AFR and SFC are improved by % and 28 % respectively ISSN 2076-2895 ... 2010 [11] Fuchs T R and C J Rutland Intake Flow Effects on Combustion and Emissions in a Diesel Engine, SAE N° 980508, 1998 [12] Ugur Kesgin, Study on the design of inlet and exhaust system of ... (SORETRAS), National School of Engineers of Sfax (ENIS), ANME and SAGAZ Authors would like to acknowledge them for their efforts and helpful technical and financial assistance References [1] Shankar K S,...

Ngày tải lên: 05/09/2013, 16:30

... satisfaction and as follows not high quality 1.3.5 Quality according to Juran In “Jurans’s Quality Control Handbook” [7] Joseph M Juran provides two meanings to quality: The word quality has multiple ... In ISO 9126:1 there are three approaches to software quality; internal quality (quality of code), external quality (quality of execution) and quality in use (to which extent the user needs are ... is that quality means goodness, or luxury or shininess The word quality is often used to signify the relative worth of something in such phrases as “good quality , “bad quality and “quality...

Ngày tải lên: 20/12/2013, 19:15

... micro mixing in the mixing head macro mixing in the whole vessel Jetstream Mixer Installation: Top Entry Side Entry Bottom Entry Jetstream Mixer Lab mixer Power: 0,5 kW Stator diameter: 20 mm Mixing ... Types and Process Technologies Jet Mixer Homogenous Mixing Dissolving Suspending Cooling, Heating Crystallisation Disperser Dispersing Emulsifying Wet Grinding Melting Extracting Dispermix Mixing ... Installation from top or as side entry Lump free dispersion of gels and high viscosity products Ideal combination of homogenous Mixing and Dispersion Production of Dispersions, Emulsions, Solutions...

Ngày tải lên: 25/12/2013, 14:03

... Juran's Quality Control Handbook 4th ed., McGraw-Hill, New York, 1988 J M Juran and F M Gryna, Quality Planning and Analysis, McGraw-Hill, New York, 1980 R C Swanson, Quality Improvement Handbook, ... the quality of goods and services, as perceived by the customer, is a function of the entire enterprise Hence, the entire enterprise must be engaged in planning for quality and delivering quality ... specialization in the quality function as a means to assure the quality of war materials The government's document for quality, MIL-Q-9858, specified a separate and independent quality department...

Ngày tải lên: 26/12/2013, 01:18

... means Y Example: Trade and industry, and the government should give part-time and twin jobs a chance Then a breach of the traditional family pattern of the working man and the housekeeping woman ... Moslems (quality) The results of the Dutch skating team at the world championships in Innsbruck in 1990 were disappointing (judgement): the skaters came second, third, fourth and fifth (quality) ... (analogy) Every economic crisis leads to war Just look at the Netherlands: there was an economic crisis before World War II, and the years preceding World War II were the same (generalization)...

Ngày tải lên: 24/01/2014, 00:20