Concrete is one of the main civil engineering materials at the present times. According to a certain proportion, cementing material, aggregates, skeletal materials and water are mixed into configuration. By mixing and vibration, the concrete is molded and then conserved in certain conditions. The concrete features with abundant of raw materials, low price, and simple production process. For the dosage are more and more, the concrete also features with high compression strength, well durability, wide strength grade, etc. These features make the range of application of the concrete quite wide. The concrete is not only used in all kinds of civil engineering, but also shipbuilding industry, machinery industry, marine development, geothermal projects.
In the preparation of concrete, according to the requirements of the engineering, such as workability, strength and durability, the raw materials should be chosen reasonably and the proportion should be confirmed to achieve the economical and applicable purpose.
According to the different requirements and conditions in construction, the concrete can be concentrated mixed in the construction site or station. Automatic fall type mixer can be used for the concrete mixture whose liquidity is better. Mandatory mixer is used for the concrete mixture whose liquidity is lower or the harsh concrete. Before mixed, the materials should be prepared according to the proportion and the weighting error should be controlled. Both the mixing procedure and time have influence on concrete quality so that the mixing procedure and time should be under strict control to make various components well-proportioned.
Transmission and irrigation built: the concrete mixture can be transported to the construction site by hopper, rubber belt conveyor or mixing truck. The way of built filling can use manual work or the mechanical work. Using the concrete pump to transport and irrigate concrete mixture, this method features with high efficiency, which can reach hundreds of cubic meters per hour. Both the cast-in-site concrete engineering and prefabricated part, should confirm the density of the irrigation built concrete. The methods mainly consist of: vibrating screening, centrifugation, extrusion and vacuum operation. The vibration can be left out if the liquid concrete is mixed with some efficient water reducer.
The main purpose of the maintenance is to create the proper temperature and humidity conditions so that the harden speed of normal concrete can be confirmed or sped up. Different maintenance methods of concrete have different effects on the performance of concrete. The common maintenance methods consist of: natural maintenance, steam curing, dry hot and humid maintenance, autoclaved maintenance, the electric heating maintenance, infrared maintenance and solar maintenance. The curing period is the time of maintenance. In order to be compared with conveniently, the rule is that test specimens for determining the concrete performance must be maintained in standard conditions. The standard condition of maintenance in China is that the temperature is 20±3℃ and the humidity is no less than 90%

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Minimum order quantity: 1 piece Type of payment: 100% Payment in Advance  Warranty: one year Courier partners: DHL, UPS, TNT, FedEx and EMS Lead time: 2-3 working days Technical specification, manuals and data sheets: Available on request To get our best price & fast quotation, pls send us e-mail now. This is Ricardo. Email me:[email protected] Inquiry on Skype:+8618020714492 Call me by phone : +8618020714492 Whas APP: +8618020714492 QQ:2103984536 Wechat: 18020714492 About Us We have a large inventory of high quality, surplus control system parts. We also distribute many new hardware and software products to help supporting your existing control systems or utilize the latest control technology. We have experienced staff, extensive test facilities and we can provide 1-year warranty for all of our surplus parts. We major in ABB DCS Foxboro DCS,Honeywell DCS,Westinghouse Ovation DCS,Emerson DeltaV, Bently Nevada,Rockwell Automation, Siemens, Rockwel CPU,Moore APACS,Moore Panel Controllers,Siemens Iskamatic,Schneider PLC,Quantum,Quanten 140CPU,GE Fanuc 90/30,90/70 ,Invensys Triconex DCS, FOXBOROI/A MOTOROLA MVME,, Siemens and aother listed manufacturers. If you find the same parts from any other suppliers cheaper than us , we will try to match that the same price,or provide you with a further discount. If you have any further questions, please don't hesitate to contact us. If you inquiry more than one piece/item, please let us know, because we can arrange discount for you. looking forward to your enquiries. Advantage brands:  TRICONEX(3008,3625,3805E.3721,3700A 4351B...) BENTLY NEVADA(3500/42M ,3500/22M,3500/95.3500/05...) HIMA(F3330,F3236 ,F6217,F7126,F8621A...) FOXBORO(FBM203,FBM204,FBM217,FMB231...) Allan-Bradley (1756,1785,1771,1746,1769...) ABB(OCS,DCS,BAILEY,H&B Freelance 2000,DSQC...) GE(IC693,IC697,IC695,IS200,DS200...)  BACHMANN(CM202,DI232,MPC240,NT255,AIO288...) Hot Selling EMERSON KJ1501X1-BC2 EMERSON KJ3201X1-BA1 EMERSON KJ4001X1-BA3 EMERSON KJ3203X1-BA1 EMERSON KJ3204X1-BA1 EMERSON KJ3241X1-BA1 EMERSON KJ3222X1-BA1 EMERSON KJ2003X1-BB1 EMERSON KJ3202X1-BA1 MYNAH GRW1780273 ABB ABB DSSR 116  ABB DSDI 110 ABB DSDO 115 ABB DSPC 155 ABB DSMB 144 ABB DSCA 114 ABB DSCA 125 ABB DSBC 110 ABB DSAI 110 ABB  DSTD 150A ABB PM864AK01  ABB CI858K01 ABB DO820 ABB DI810 ABB AO820 ABB AI 810 Advantage Brands: Allan-Bradley (1746,1747,1756,1769,1794,2711P..) TRICONEX (3008,3664,3805E.3704E,3700A 4351B...) YOKOGAWA (CP345,CP451-10,AMM12C,AAI141-S00...) ABB (07KT98 WT98,07KT97 WT97,DSQC679,IMASI23,IMDSO14...) Ovation (1C31194G01,1C31197G01,5X00106G01,1C31125G02...) BENTLY NEVADA (3500/42M ,3500/22M,3500/95.3500/15...) HIMA (F3330,F3236,F6217,F7126,F8621A....) FOXBORO (FCP270,FBM203,FBM204,FBM217,FMB231...) GE (IC693,IC697,IC695,IS200,IS215,DS200...) BACHMANN (MPC240,CM202,DI232,MPC240,NT255,AIO288...) Contact: Ricardo Email:[email protected] Mobile Phone:86-18020776791(WhatsApp,Skype,Wechat) QQ:2851195479

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