MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Concrete containing steel bars crushing
Compressive strength and corrosion behavior of steel bars
2023年6月27日 In this study, the corrosion resistance performance of steel bars embedded in FNS and fly ash (FA) concrete is evaluated using the accelerated corrosion test method2022年11月24日 This research describes the results of test of reinforced concrete beams containing different types of waste materials, namely crumbed rubber, granular plastic, and Mechanical Properties and Flexural Strength of Reinforced The evolution of steel bar and corrosivecrack propagation of reinforced concrete in three different solutions including MgSO4, Mg 2+SO 4 2Cl−, and seawater were examined using Corrosion Behavior of Steel Bar and Corrosive Cracking of The properties of concrete containing natural coarse aggregate (NCA) and crushed concrete aggregate (CCA) is determined The aim of the study is to find the optimum replacement ratio Bond strength of concrete containing crushed concrete aggregate
Effect of Zeolite Inclusion on Some Properties of Concrete and
Crushed dolomite with a maximum nominal size of 16 mm was used as coarse aggregate The aggregate had a specific gravity of 265 and a crushing modulus of 23 percent high tensile 2020年7月30日 Concrete blocks with epoxy coating showed the highest reduction in pullout value The pullout strength value adversely affected with the appearance of corrosion This Corrosion effects on the bond behaviour of steel bars in self 2024年2月8日 The bonding strength of steel bars in concrete using coarse aggregate from recycled concrete or using GPOFA in the mixture is not different from that of natural aggregate Assessment of bonding strength of steel bar in recycled aggregate “Steel scrap” concrete is a concrete containing fibrous material that is uniformly distributed and casually oriented The steel scrap waste material which is obtainable from the lathe can be Performance Analysis of Steel Scrap in Structural Concrete IOSR
Bond behaviors between nanoengineered concrete and steel bars
2021年9月13日 This paper investigated the bond characteristics between eight types of nanofillers modified reactive powder concrete (RPC) and plain steel bars, aiming to explore 2022年11月24日 The reading from strain gages indicated also that yielding occurred in the control beam and the beams containing different percentage of plastic waste material and crushed brick specimens prior to the concrete crushing of the beam, while the beam containing 10% rubber failed by compression of concrete and the steel stain is below yield valueMechanical Properties and Flexural Strength of Reinforced Concrete 2020年7月30日 The corresponding percentages decrease in the slipping values were 195% and 224%, respectively Such behaviour can be explained by the forming a film around the steel bars which considerably tends to reduce the mechanical friction resulting at both surfaces of concrete and steel bars The latter friction is the major source of bond strengthCorrosion effects on the bond behaviour of steel bars in self 2024年2月28日 Glass FibreReinforced Polymer (GFRP) rebars have been widely used in the construction industry to prevent corrosion and increase structural strength properties The benefits of GFRP bars include strong performance against fatigue, nonconductivity, electromagnetic resistance, and a high tensile strengthtoweight ratio Compared to conventional steel Flexural behaviour of reinforced concrete beams reinforced with
Flexural Performance of Reinforced Concrete Members with Steel Bars
2021年5月15日 Grade 60 steel bars are replaced with hightension bars, a much larger flexural strength can be obtained whi l e maintaining the ductile fracture ch aracteristics Ansely et al [29]2022年12月15日 This study investigates the flexural performance of hybrid reinforced concrete (HRC) beams with steel and basalt fiberreinforced polymer (BFRP) bars at two levels considering the concrete cover, bondslip model of BFRP bars, and hybrid reinforcement ratio of the BFRP to steel areas (A f / A s)First, five experimental specimens with different concrete covers Experimental and numerical parametric study on flexural behavior Specification for Stainless and HeatResisting Steel Bars and Shapes Tests on stainless steel for reinforcing bars originated in the 1970's with work on S30400 and S31600 stainless steels In some of this work S31600 stainless steel was partly embedded in concrete, exposed to stagnant, and to flowing seawater for 125 yearsStainless Steel Reinforcing Bars in Concrete2021年12月1日 The raw materials used in this experiment were: General blended cement (GBC), two sizes of coarse aggregates (10 and 20 mm), sand (5 mm), crumb rubber (2–5 mm), “MasterPolyheed 8875” water reducer (BASF), “MasterAir 905” air entraining admixture (BASF) and deformed steel bars D500N grade of diameters 12, 16, 20 and 24 mm Table 1 shows four Bond behaviour between crumb rubberized concrete and deformed steel bars
Performance study of precast reinforced concrete shear walls with steel
2021年7月2日 A novel structural system based on precast reinforced concrete (RC) shear wall panels mutually connected vertically using Tconnectors and horizontally using frictionbearing devices (FBDs) mounted on interposed steel columns was recently proposed To investigate the seismic performance of the proposed precast RC shear wall system, three subassembly Ultrahighperformance concrete (UHPC) is an emerging class of cementitious composites, commonly proportioned using particle packing theory and reinforced with discontinuous steel fibers, that offers superior mechanical and durability characteristics compared to conventional and other fiberreinforced concretes (De Larrard and Sedran 2002; Graybeal 2006a; Habel et al Flexural Behavior and Design of UltrahighPerformance Concrete 2023年11月6日 1 INTRODUCTION Because of its high mechanical and durability features, concrete is the most extensively used construction material in buildings, bridges, dams, and so forth 1, 2 Steel in different forms (bars, fibers, wires, meshes, etc) has been used as reinforcement in reinforced concrete (RC) since its release in the mid19th century Steel Tests and finite element modeling of concrete beams reinforced 2009年6月1日 The fullrange behavior of partially bonded, together with partially prestressed concrete beams containing fiber reinforced polymer (FRP) tendons and stainless steel reinforcing bars was simulated using a simplified theoretical model The model assumes that a section in the beam has a trilinear moment—curvature relationship characterized by three particular points, Nonlinear behavior of concrete beams with hybrid FRP and
BondSlip Relationship of Reinforcing Steel Bars
2009年4月5日 The effect of deformation pattern on bond strength is studied using 1 in (25 mm) diameter machined bars with deformation heights of 005, 0075, and 010 in (127, 191, and 254 mm) and 2021年12月2日 Replacement of natural aggregates (NAs) with recycled concrete aggregates (RCAs) in complex reinforced concrete (RC) structural elements, such as deep beams with openings, supports environmental Shear Response of Recycled Aggregates Concrete 2020年10月1日 The chloride threshold values (% by weight of concrete) of these reinforcements in coral aggregate concrete were determined and ranked from small to large as follows: ordinary steel (＜015% Corrosion behavior of low alloy steel bars containing Cr and Al in 2021年11月21日 In this study, the impact of steel fibres and Silica Fume (SF) on the mechanical properties of recycled aggregate concretes made of two different types of Recycled Coarse Aggregates (RCA) sourced Mechanical Properties of Recycled Aggregate Concretes Containing Silica
(PDF) Flexural Behaviour of Lightweight Foamed Concrete
Table 3 Reinforcement details Group F group N group Beam code Concrete type Reinforcement type FG Foamed concrete 2x12mm GFRP bars FS Foamed concrete 2x12mm Steel bars NG Normal concrete 2x12mm GFRP bars NS Normal concrete 2x12mmSteel bars Figure 2 Reinforcement Details of beam 242019年4月15日 The performance of reinforced concrete structures depends on adequate bond strength between the concrete and reinforcing steel Since the introduction of strength design in 1963, the use of Cracking Behavior of HighStrength Spiral Steel Bars in Concrete 2019年10月15日 The data pool thus covers a wide range of test parameters, with the crosssection dimension ranging from 300 to 600 mm, the concrete strength from 287 to 617 MPa, the steel plate thickness from 650 to 1291 mm, the link spacing from 120 to 600 mm, and the gauge length from 1200 to 2600 mm Specimens cast with steel fiber concrete or having additional Structural behavior of steelconcrete partially encased composite strength of steel bars and the compressive strength of concrete, respectively Hence, the lower longitudinal reinforcement ratio in concrete columns reinforced with HSS bars potentially affects the loadcarrying capacity, flexural performance, and postpeak behavior of eccentrically loaded columns High strength steel bars were first used in RCBehavior of concrete columns reinforced with highstrength steel
Chloride ion permeability of concrete containing recycled
2024年4月19日 Under this condition, the transport mechanism of chloride ions entering the concrete structure is primarily dominated by diffusion [18], [19] The depassivation effect of chloride ions on steel bars can accelerate the deterioration of steel bars and gradually jeopardize the whole reinforced concrete system2013年4月18日 The results of thirty pullout tests carried out on 8 and 10 mm diameter deformed steel bars concentrically embedded in recycled aggregate concrete designed using equivalent mix proportions with coarse recycled concrete aggregate (RCA) replacement percentages of 0, 25, 50, 75 and 100 % are reported towards investigation of bond behaviour of RCA concrete Bond Bond behaviour between recycled aggregate concrete and deformed steel bars2018年10月20日 In this study, highstrength steel (HSS) reinforcement with a yield stress of about 600 MPa was used in reinforced concrete columns to reduce both the reinforcing bar congestion and the construction costs For this purpose, 16 square concrete columns reinforced with either the conventional normalstrength steel (NSS) or HSS rebars were subjected to axial Behavior of concrete columns reinforced with highstrength steel 2023年4月20日 The properties of FRP bars contribute to better performance in concrete structures particularly in beams [30]The overall flexural strength of FRP reinforced concrete beams increases with increase in compression capacity of concrete, elastic modulus of FRP, and reinforcement ratio in tensile region [29]The lower axial stiffness of FRP reinforcement helps Shear and flexure of FRPreinforced concrete beams and slabs – A
Profile of concrete crushing in the columns ResearchGate
In this research work, different combinations of normal strength concrete (NSC), ultrahighperformance concrete (UHPC), and steel fiberreinforced UHPC (SFRUHPC) concrete with rebars of and composite action of concrete and steel Although bond behaviour between NCA concrete and steel rebars has been extensively studied [11–13], very few investigations have been reported on bond between RCA concrete and steel reinforcement [14–16] such that most of the recommendations in the literatureBond behaviour between recycled aggregate concrete and deformed steel bars2021年9月13日 In general, it can be said that the concretebar bond performance may be degraded if these three mechanisms occur: (i) due to the disappearance of the reinforcement surfacesurrounding concrete chemical adhesion, bar sliding occurs; (ii) due to the crushing of concrete adjacent and between the bar keys, the bar pullout occurs; (iii) since bar ribs are Evaluation of postfire pullout behavior of steel rebars in high Corrosion of steel bar is amongst the most important causes of deterioration of reinforced concrete structures (Fig1) Corrosion occurs due to the presence of chlorides in concrete / environment and / or ingress of carbondioxide into the concrete from the environment (ie carbonation of concrete)Enhancing Corrosion Resistance of Steel Bars in Reinforced Concrete
(PDF) Flexural Behavior of Concrete Beam Reinforced with GFRP Bars
2021年6月23日 However, the stiffness of the concrete beams reinforced with GFRP bars reduced when compared to the ones reinforced with steel bars Details of tested beams (dimensions in millimeter) Typical 2024年9月4日 Materials Ordinary Portland cement was used to case all the beams in the experiments in this study Tests of the physical and chemical properties confirmed that this type of cement conforms to the Iraqi Specifications IQS 5/2019 []Ponza aggregates from the mountains in Iran were used as lightweight aggregate to decrease the selfweight of the studied concrete Studying the possibility of structural performance improvement of Seliem et al [25–27] reported that highperformancesteel reinforcing bars had a higher tensile strength than conventional steel bars, increasing their useful life when used in the construction of bridges; they predicted that, when integrated with concrete, steel bars could be bent up to 90° without damage to the ultimate strengthFlexural Performance of Reinforced Concrete Members with Steel Bars2020年3月6日 It has been observed that failure may occur at far lower deformations in structural concrete members containing steel fibers than without the fibers the addition of fibers to the RC member may lead to a failure mode governed by rupture of the longitudinal reinforcing bars or crushing of the concrete Get full access to this articleStrength and Deformation Capacity of Tension and Flexural RC
Effect of Using Glass Fiber Reinforced Polymer (GFRP)
2023年4月26日 The study aims to conduct a direct pullout test on fiftyfour cube specimens considering different variables, including the type of reinforcement (sandcoated glass fiberreinforced polymer (GFRP) and ribbed steel bars); 2021年11月9日 Cooperation of RSF with the steel bars in carrying loads was proved Findings from the Digital Image Correlation (DIC) revealed no impact on the cracking pattern of the RC beams Keywords: RC beams with a span of 21 m made of concrete containing 40 kg/m 3 and 60 kg/m 3 of fibres were investigated in Laboratory Tests of Concrete Beams Reinforced with Recycled Steel 2024年4月19日 Concrete containing sulfate near the coast [23], and the presence of these chloride ions in recycled aggregates may affect the bond between steel bars and concrete by 15–30 mm) was recycled aggregate (RA) The recycled aggregate used herein, as shown in Fig 1, was obtained by crushing concretes that had Performance of concrete containing sulfateeroded recycled good service life and low maintenance Concrete has its drawback in relatively low strength per unit weight Concrete‟s tensile strength is characteristically 815% of its compressive strength This limitation has been dealt with by engineers in recent and past times by utilizing rebar‟s (reinforcing bars) to create reinforced concretePerformance Analysis of Steel Scrap in Structural Concrete IOSR
Pipe positioning for the standard crushing test [6,7]
Download scientific diagram Pipe positioning for the standard crushing test [6,7] from publication: A new approach on crushing strength test for fibre reinforced concrete pipes The fibre 2020年11月15日 This study aimed to investigate the corrosion rate, corrosion resistance, and bond behaviour of stainless steel (SS) bars in comparison to carbon steel (CS) bars Concrete specimens (M30) were Bond behavior between concrete and steel rebars for stressed elements2024年7月1日 To achieve SFRC beamcolumn joints with an acceptable lateral load response, the optimum replacement steel bars by GFRP bars in existence flyash based concrete should satisfy the design provisions regarding failure mode, ultimate drift ratio, lateral load capacity, ductility demand, and existence of the stiffness degradation compared to normal strength Structural efficiency of flyash based concrete beamcolumn joint 2023年8月7日 The axial compressive behavior of UltraHigh Strength Concrete (UHPC) columns reinforced with basalt bars was investigated in this work Only a few research projects have used basalt Reinforced Concrete Columns Under axial stress, 12 columns of 150 × 150 mm in cross section and 1200 mm in height manufactured of M120 grade UHPC, incorporating glass Structural Behavior of UltraHigh Strength Concrete
Corrosion Behavior of Steel Bar and Corrosive Cracking of Concrete
2016年4月28日 The evolution of steel bar and corrosivecrack propagation of reinforced concrete in three different solutions including MgSO4, Mg2+SO42Cl, and seawater were examined using electrochemical