DESISGN PROCEDURE:- 1;- use. M40 GRADE CONCRETE 2:-Minimum cement content 360kg percum If fly ash is more than 20% the minimum cement contents 310kg percum. 3:- The flexuar strength cement concete after 28day 4.5 MPA. 4:-The compressive strength of cement concete after 28day curing 40 MPA. 5:- Dowel bar provided expension joint vehicle load transfer one.slab.to another slab. Dowel bar size 32mm S240 length 300mmC/C PVC dowel sheet size 34mm×100 micron 330mm pvc dowel sheet cap, 330mm length of dowel bar full length of greasing. Insert pvc dowel sheet, 170mm dia dowel bar epoxy coated . 6:- Tie bar provided longitudinal directions of mid depth of slab. To protect transverse cracking and differentional deflection. Tie bar. size 12mm dia tor bar length of tie bar 1m. Spacing 300mmc/c Tie bar full length 1m epoxy coated protection. Protection for corrosion. 6:- The PQC mix premix batching plant material is homogeneous and uniform. The pqc premix batching plant not More than 10km. Hiwa loaded pqc and carried from to site. Workability is less 25mm+- 10mm , cement slurry stiff, self loaded pqc compacted ,effects of pqc Temperature less than 25deggre celceious. 7:- separation memberanc size 125 micron over lapping of length 300mm. Before separation memberance laying the DLC surface swept clean of all extereneious dirt bya air compresser and Sprinkler water drop down on dlc surface to maintain pqc Temperature. Separation memberanc straight and tight.. 8:- separation memberanc laying on gunney beg and old conver belt for moving Of hiwa , jcb protection of separation memberanc. Hiwa PQC drop on separation memberanc andl laying jcb buckets. 9:- Automatic electromagnetic electronic paver sensior machine speed1.2 m/ min PQC 300MM, and dowel bar loaded in paver machine, pqc is properly compacted maintain proper camber,no segregation, bleeding and honey comb pqc surface and dowel bar drop down mid depth of slab. 10:- Relative humidity is less than 25% and wind velocty more than 12km/ hr moving on roof truss on pqc avoid shrinkage of slab. 11:- Texturing machine transverse directions texturing of pqc 3mm to 4mm depth and 3 mm depth. Under final setting time 4 to 8 hr.done texturing operation. Finish. 12:- expension joint 25mm sawing within 4hr to 8 hr and 2MPA TO 7MPA ,joint filling bituminous Within 24 hr. 13:- PQC surfaces laying hessian cloth and gunney beg sprinkler water drop down on surfaces area and curing 28 days 14:- after 21 days polysulphide sealnt poured in joint. 15:- polysulphide sealnt perform 7year to 8 hour.

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Explanation of design procedure for M40 grade concrete with dowel bars and tie bars.

  • Minimum cement content of 360kg percum for M40 grade concrete

  • Dowel bars of size 32mm S240 length 300mmC/C and PVC do...read more

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