5—safety aspects concerning the use of polymers in concrete

... immediately after mixing lengthens the working life because most of the exothermic heat can be dissipated into the substrate without raising the temperature of the adhesive 2.1.2 Curing -There are two ... adhesive is to insure that the fresh concrete “wets out” the hardened concrete surface The resulting bond is obtained from the penetration of the cement paste of the fresh concrete into the surface ... measure thereof Specifically the ratio of the shear stress existing between laminae of moving fluid and the rate of shear between these laminae 503.5R-4 ACI COMMITTEE REPORT Working life -The period...

Ngày tải lên: 24/10/2014, 22:11

... set by the manufacturer 5.2—Mixing of the epoxy adhesive Epoxy adhesives are supplied as a two-part system, one containing the epoxy resin and the other containing the hardener or curing agent ... minimum of 1/4 in (6 mm) in depth, consistent with the type of repair This saw cutting delineates the repair area and serves to reduce edge spalling and weakness possibly introduced by outlining ... projecting jets of potable water, d Jackhammers, which remove concrete by impacting the surface Upon completion of removal of the concrete by one or more of the above methods (Department of the...

Ngày tải lên: 24/10/2014, 22:11

... secreting cells/well) for MART-1 This finding is due to the fact that the PBMC cell count is used as the denominator when calculating the detection frequency The lower cell number in the denominator ... recovery of an analyte in biological matrix (matrix effect) is defined as the direct or indirect alteration or interference in response due to the presence of unintended analytes or other interfering ... ELISPOT) In summary, assay performance of each assay met the validation criteria and the three validated assays demonstrated that they served their intended use Discussion The use of a wide variety of...

Ngày tải lên: 18/06/2014, 15:20

... three slices of the ADC map depicting the largest tumor diameter were selected, depending on the volume of the tumor In each slice a region of interest (ROI) was delineated according to the tumor ... sections through the liver were acquired in each 20-s breath-hold, and the entire liver (from the level of the diaphragm to the inferior edge of the liver) was typically evaluated in two to three ... geometry The border of the ROI was placed in the tumor periphery close to the tumor margin, so that the ROI encompassed almost the whole tumor area (Figure 3) The measurements were performed independently...

Ngày tải lên: 09/08/2014, 09:20

... strength of the concrete, leading to cracking in the concrete Due to the induced restraint inherent in a jointed concrete pavement, contraction joints should be spaced in accordance with Fig 4.1 Joint ... final setting of the concrete to ensure crack initiation Conventional cutting methods, because the depth of cut is nominally d/4 or d/3, are used at ages much later than final setting of the concrete ... particularly if the early-entry method is used The time of cutting required to control cracking depends on the strength of the concrete and the depth of the cut or the notch as well as the weather conditions...

Ngày tải lên: 24/10/2014, 22:11

... diagram of EDIII protein The amino- and carboxyl-termini are indicated in white The lateral ridge is composed of the N linker and BC, DE and FG loops The A strand is circled in yellow, AB loop in ... explaining the cross-reactivity of the mAbs Since it faces inward toward the nucleocapsid, 19 Chapter 1: Introduction the AB loop is poorly accessible on the surface of the mature virion Therefore, ... [131], the N-terminal TPS domain of the FhaB precursor protein first associates the POTRA domain of FhaC, which causes the channel to open (Figure 1.3) The N-terminus of FhaB remains associated...

Ngày tải lên: 09/09/2015, 08:18

... pipe cap to the concrete surface with an epoxy adhesive If the test results not in failure of the concrete but in cohesion of the epoxy resin adhesive or any failure in adhesion, the test shall ... cure concrete in accordance with procedures defined in 2.3.1.2 Mechanical abrasion -Use sandblasting, Chapter 12 of ACI 301 and as indicated in the project scarifying, waterblasting, or other ... Inspection of concrete surfaces Specify if architect/engineer will also inspect, and if hold points are required 2.3.2.2 Minimum pullout strength The test method specifies the bonding of a steel...

Ngày tải lên: 24/10/2014, 22:12

... 19] .The majority of the acid sites in crystalline solid acids are located within the pores of the material, such as with zeolites [3, 20] Thus, main feature in assessing the level of polyolefin ... represent the thermal degradation, and (3) represents the random degradation route of the polymers pyrolysis The fourth type of mechanism, that is, cross-linking often occurs in thermosetting plastics ... is incinerated Generation of the heat energy is the only advantage of this process The residual of this incineration has 20wt%, respectively, 10 vol% of the original waste and are placed in landfills...

Ngày tải lên: 27/11/2013, 21:35

... as the rate of loading decreases 2.1.8 Concrete strain-Similar to the behavior of concrete under sustained loads, the strain of concrete during repeated loading increases substantially beyond the ... with increasing minimum stress level in proportion to the ratio of the change in the minimum stress level to the tensile strength of the reinforcing bars 2.2.3 Bar size and type of beam-These ... increasing size for the wires in the strand Several writers59 have hypothesized that for strands the successive lengthening and shortening of the cables produces alternating tensions in the individual...

Ngày tải lên: 24/10/2014, 15:46

... determine the feasibility of changing the use of a structure or retrofitting the structure to accommodate a different use from the present one The feasibility of enlarging the structure or changing ... c) Sampling and material testing d) Evaluation e) Final report The findings of the detailed investigation will directly influence the final outcome of the evaluation process, the choices of various ... 1988) Indicating condition of steel reinforcing bars in concrete masonry Indicating the corrosion activity in concrete pavements Electrical potential of concrete indicates probability of corrosion...

Ngày tải lên: 24/10/2014, 21:59

... by reviewing each of the items indicated in this specification guide and checklist and then including their decisions on each as mandatory requirements in the project specification SG3-These mandatory ... project specifications since taking them out of context may change their meaning’s_ SG2-However, adjustments to the needs of a particular project shall be made by the Architect/Engineer’s designers ... Specification ACI 503.1 an official part of the contract requirements: The use of an epoxy adhesive for bonding hardened concrete, steel, wood, brick, and other materials to hardened concrete shall conform...

Ngày tải lên: 24/10/2014, 22:12

Ngày tải lên: 08/08/2012, 17:20

... (Kuhn, 1970) point of view In view of the above investigation, integration is tentatively interpreted as an act or a process of joining or combining something with something else The integrated approach ... omitted from the analysis It is clear that the integrated (in the sense of holistic) approach has been incorporated in the framework of IA Therefore, instead of differentiating the integrated approach ... process of establishing confidence in the soundness and usefulness of the model According to these authors, model validity is equivalent to the user’s confidence in the usefulness of a model The...

Ngày tải lên: 06/11/2012, 10:35

... Phước, Tây Ninh thành phố Hồ Chí Minh; ĐBSCL gồm tỉnh Long An, Tiền Giang, An -18- Giang, Kiên Giang, Cà Mau, Sóc Trăng, Bạc Liêu, Đồng Tháp, Bến Tre, Hậu Giang, Vónh Long, Trà Vinh thành phố ... lớn, nước ròng… Nam Bộ vùng đất đa dạng sinh học Khí hậu - thuỷ văn tạo điều kiện cho động thực vật sinh sôi nảy nở, thích hợp cho việc phát triển nguồn sinh vật cạn nước, thuận lợi cho canh tác ... lớn nước Ven biển có rừng ngập mặn rộng lớn Từ Cà Mau đến Kiên Giang có rừng nguyên sinh U Minh Thượng, U Minh Hạ Rừng có nhiều loài động thực vật quý Hình ảnh quen thuộc sân chim, kèo ong, sếu...

Ngày tải lên: 17/04/2013, 16:09

Ngày tải lên: 22/08/2013, 10:58

... shielding the fringing magnetic field and to reduce the power consumption The use of jacket is to provide a return path for the magnetic field lines and thereby shield the adjacent components The use ... The use of electromagnet has wide flexibility of tuning the plasma to get the best operating conditions The use of electromagnet (instead of permanent magnets) helps one to investigate the plasma ... used by the ECR community for the extraction of singly charged ion beams The ‘2D Poisson’ software package has been used in the present work for simulation of the magnetic field pattern using solenoid...

Ngày tải lên: 22/12/2013, 08:58

... variations in the fiber core can affect the angle and speed that a light pulse can travel This effect is the refractive index profile of the material, which is calculated as the ratio of the speed of ... to Make the Most of Your Investment Unfortunately, the use of VCSELs can cause differential mode delay (DMD), an effect that happens when the laser beam launched into a small area of the fiber's ... significant part of the data center Fiber backbone links are also the most critical links because they carry data to and from a large number of sources, including telecommunication rooms and the outside...

Ngày tải lên: 24/01/2014, 11:20

... a interesting: 15% b boring: 40% c difficult: 10% d relevant: 25% e others: 10% 25% 40% 10% ) > 23% ) 0% 9% a interesting: 9% b boring: 48% c difficult: 20% d relevant: 23% 20% )&> 48% e others: ... 15% 15% 30% b useful: 15% 15% c inadequate to improve reading skills: 40% d monotonous: 30% 40% > + ) $ $ B a various: 13% 13% 29% b useful: 12% 12% c inadequate to improve reading skills: 46% ... ) :A B, $ ) / ? ) ) * # * !6 9?: R< / $ $ : = ;> ? ( 20% a at home: 80% b in class: 20% 80% + + 15% a at home: 85,5% b in class: 14,5% 85% +& & + ) ) , ?6 6R / / / ) ) * / ) ?!R 8! / = ? +...

Ngày tải lên: 29/01/2014, 14:39

... used V2.0 of the Lake States Standard in the October 2005 main assessment of Michigan DNR because that was the operative version of the standard at that point in time Version 2.0 of the Lake Standards, ... to the nature of the ASI surveillance procedure, the audit evidence is necessarily based on a sample of the information available and therefore there is always an element of uncertainty in the ... sample of the valid certificates of the audited CB within the scope of accreditation The number of audits per year is determined by ASI surveillance policy; sampling is based on the ASI sampling...

Ngày tải lên: 17/02/2014, 21:20

... Tripodi75 including examples of street graffiti promoting the marketing theme (shown here) Further concerns There are further concerns regarding the self-regulations, which we intend to analyse in the ... differ in the extent of their coverage for self-regulating their marketing messages to children, with some including product placement, use of licensed characters and their own branded sites in the ... aspects of the product In the example below, the Kinder chocolate is promoted to parents as containing milk and being only a ‘snack’ size Products are sold in multi-packs of and 16 for repeating the...

Ngày tải lên: 18/02/2014, 21:20