1—microhardness in and beyond the contact zone of concrete with differing and various coarse aggregates khokrin 1973
guide for structural lightweight-aggregate concrete
... maintain continuity, or 213R-20 ACI COMMITTEE REPORT Fig 4.13—Micrograph of contact zone Table 4 .1—Microhardness in and beyond the contact zone c/z of concrete with differing w/cm and various coarse ... °C) (Khokrin 1973) , the quality and integrity of the contact zone of lightweight concrete is considerably improved As the onset of microcracking is most often initiated at the weak link interface ... the effect of the interface flaws linking up with microcracking in the mortar phase of the matrix The phenomenon of bleed water collecting and being trapped under coarse particles of lightweight...
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recent approaches to shear design of structural concrete
... metal skin would coincide with the angle of inclination of the principal tensile strain as determined from the deformations of the skin, the transverse frames, and the longitudinal stringers This ... depends on the magnitude of the shear, the strains of the struts and stirrups on the longitudinal strain εx in the middle of the web, and on the crack spacing The results in Fig 3.3 support the notion ... of the inclined 445R-18 MANUAL OF CONCRETE PRACTICE cracks Then, the principal tensile strain, ε1, in the web and the widths of the inclined cracks are calculated, as in the MCFT, discussed in...
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Workability and stability of lightweight aggregate concrete from rheology perspective
... height of the inner cylinder in relation to the sample mix in the outer cylinder The top-ring also minimises additional shearing at the top of the inner cylinder caused by surface tension The device ... is the effective height of the inner cylinder (m) as shown in Fig.2.11, Ri the radius of the inner cylinder (m), and Ro the radius of the outer cylinder (m), according to Fig.2.9 By substituting ... a linear line indicating that as the concrete is being sheared in a decreasing shear stress environment, the rate of decrease in the shear stress is proportional to the rate of decrease in the...
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Penetrability of lightweight aggregate concrete
... from the viewpoint of the stability of various concretes Studies of the resistance of concrete have shown that the deterioration intensifies in hot water and due to the swelling of the concrete and ... penetration of additional chloride ions, and ends up spalling of the concrete owing to the expansive forces resulting from the formation of rust This spalling of the concrete exposes a new concrete ... marine structures include: the USS Selma, the ship Atlantus; a floating dock in Genoa Habour and a underwater oil storage tank in 150m of water in the North Sea off the west coast of Scotland The...
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analysis and design of reinforced and prestressed-concrete guideway structures
... impact on the cost of the system Standardization of the guideway components can lead to cost savings During the planning and design stages of the transit system, the benefits of standardizing the structural ... reinforcement passing through the joint in 0.0 the tension zone: 366.1R-26 MANUAL OF CONCRETE INSPECTION l With bonded non-prestressed reinforcement passing through the joint in the tension zone: ... aggregates, the water-cement ratio of the mix, the type and the duration of curing, surface-to-volume ratio of the member, the ambient temperature and relative humidity at the time of placing the concrete...
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Design of modern highrise reinforced concrete structures hiroyuki aoyama
... least at the beginning in the stage of technology examination, by shaping the plan as simple as possible within the practicability limit The span length of the building in Fig 1.3 is m in both ... 1905 The first all RC building was a warehouse in Kobe, designed by Naoji Shiraishi, a professor of civil engineering of the University of Tokyo and a member of the Institute of Civil Engineers of ... that were investigated in the technology examination of the Building Center of Japan This is probably the most regular of the all, but other plans investigated in the technology examination were...
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guide for the use of preplaced aggregate concrete for structural and mass concrete applications
... (1.8 m) in front of the dam, as shown in Fig 2, and backfilling the space with coarse aggregate during the winter when the reservoir was empty The aggregate was grouted in late spring in a 10-day ... segregation of sand and an increased water-cementitious material ratio in the vicinity of the end of the pipe It is important that the rate of grout rise within the aggregate be controlled to eliminate ... to the strength of PA concrete made with the same grout The reason for this is that cube or cylinder testing does not reveal the weakening effect of excessive bleeding of the grout within the...
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Real-Time Digital Signal Processing - Chapter 5: Design and Implementation of FIR Filters
... unsigned int M, int *h, unsigned int L, int *out, int *x, int index) ; where in is the pointer to the input data buffer in[ ] M defines the number of , samples in the input data buffer in [] h is the ... bmw.m given in the software package The addition of the second cosine term in (5.3.25) has the effect of increasing the width of the mainlobe (50 percent), but at the same time improving the peak-to-sidelobe ... (or ripples) in its magnitude response As the length of the filter is increased, the number of ripples in both passband and stopband increases, and the width of the ripples decrease The ripple...
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Tài liệu The Design of Prestressed Concrete Bridges ppt
... are in general the purest expression of the art of the structural engineer The core disciplines in their design are the theory of structures, the behaviour and strength of materials and the search ... depends firstly on the engineer being skilled and confident in the technical domain, and secondly in the architect having a genuine interest and feeling for engineering structures Even engineers who have ... This minority requires different training from the majority They need to develop an intuitive understanding of the behaviour of structures, a thorough understanding of the nature of the various...
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Structural design of steel work
... concrete carrying with it SO2 and CO2 gases from the air in the form of weak acids The resulting corrosion of the steel and the increase in pressure spalls the concrete Parts to be encased in concrete ... forces The structural behaviour of a steel element depends on the nature of the forces, the length and shape of the cross section of the member, the elastic properties and the magnitude of the yield ... Chapter / Actions in the assessment of the effects of actions, and uncertainties in the assessment of the limit state considered The design value of an action is obtained by multiplying the characteristic...
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Báo cáo Y học: Monitoring the structural consequences of Phe12 fi D-Phe and Leu15 fi Aib substitution in human/rat corticotropin releasing hormone Implications for design of CRH antagonists pdf
... [38,40] The changes engineered in the sequence of the peptide, either through the nature of the side chain of the new amino acids or through their non-native conformational features, increase the ... According to studies of CRH binding to single bilayer egg phosphatidylcholine vesicles, the development of the intramolecular interaction with the cell membrane is accompanied by the induction of ... 12–20 Indeed, helix bending diminishes the exposure of the hydrophobic core of Phe12, Aib15 and Val18 to the solvent, while establishing the structural basis for the side-chain interaction of the...
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Báo cáo khoa học: The structural comparison of the bacterial PepX and human DPP-IV reveals sites for the design of inhibitors of PepX activity pot
... group of the ligand and the NH2 of Asn470 (equivalent to Asn710 in DPP-IV) Another potential bond can be proposed between the OH atom of Tyr380 and the carbonyl group of the ligand Finally, the ... Superposition of the active and specificity sites of the S9 enzymes porcine POP (cyan) and human DPP-IV (orange) The stacking with the substrate proline is ensured by Trp595 in POP instead of Tyr380 in PepX ... residues involved in positioning the substrate in the active site (labelled Pos1 to Pos4); residues involved in the stabilization of the substrate in the active site (Stb1 and Stb2); those forming the...
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Principles of structural design
... dean of the College of Engineering at University of Hawaii at Manoa He was a George E Goodwin Distinguished Professor of Civil Engineering and head of the Department of Structural Engineering ... the editor -in- chief for the popular 1995 Civil Engineering Handbook, the 1997 Structural Engineering Handbook, the 1999 Bridge Engineering Handbook, and the 2002 Earthquake Engineering Handbook ... edition of the Handbook of Chemistry and Physics In recent years, we have had an increasing number of requests for reprintings of portions of our handbooks to fit a narrower scope of interest than the...
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Báo cáo hóa học: " Research Article Design and Implementation of a Lightweight Security Model to Prevent IEEE 802.11 Wireless DoS Attacks" pdf
... one interval During the ith interval, the access point calculates the tag over the beacon frame with ki from the key chain Then, the beacon frame with its tag is transmitted to the stations The ... and the rest of the packets are dropped Al these UDP packets in the queue must wait there until the end of the attacks Therefore, in the standard model, delay of the UDP packets after the attacks ... value of the TS security field In this phase, the sender station determines creation time of the outgoing control frame Then, this value is tagged into the TS field of the control frame and the frame...
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Tìm thêm: xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn hệ số công suất cosp fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha sự cần thiết phải đầu tư xây dựng nhà máy phần 3 giới thiệu nguyên liệu chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008