Methodology for Installation of paver block work Installation of Cross Drainage 300 x 300 mm excavation shall be done BEDDI! "#D C$%&"E The beddin bedding g sand sand shall shall consis consistt of natura naturally lly occurr occurring ing,, clean, clean, well well graded graded sand sand passin passing g through 4.75mm sieve and suitable to concrete manufacture. The bedding should be from either a single source or blended to achieve the following grading. I" "IE'E "I(E ) *#""I! 9.52mm 1 4.75mm 95!1 2."#mm $!1 1.1$mm 5!1 # microns 25!# " microns 1!# 15 microns 5!15 75 microns !1
%ontra %ontract ctor or shall shall be respon responsib sible le to ensure ensure that that single single!si !si&ed &ed,, gap!gr gap!grade aded d sands sands or sands sands containing an e'cessive amount of fines or plastic fines are not used. The sand particles should preferably be sharp, not rounded. The sand used for bedding shall be free of any deleterious soluble salts or other contaminants li(ely to cause efflorescence. The sand shall be of uniform moisture content, which shall be within 4) ! $), at the time of spreading and shall be protected against rain when stoc(piled prior to spreading. *aturated sand shall not be used. The bedding sand shall be spread loose in a uniform layer as per drawing. The compacted uniform thic(ness shall be 5mm and within +/- 5mm. Thic(ness variation shall not be used to correct irregularities in the base course surface. The spread sand shall be carefully maintained in a loose dry condition and protected against pre!compaction both prior to and following spreading. +ny pre!compacted sand left overnight shall be loosened before further laying of paver bloc(s ta(es place. *and shall be slightly spread in a loose condition to the predeter predetermin mined ed depth depth only only slight slightly ly ahead ahead of the laying laying of the paver bloc(. bloc(. +ny depressions in the spread sand e'ceeding 5mm shall be loosened, ra(ed and re spread before laying of paver bloc(.
+#,I! +#,I! $- I.E&+$C/I! I.E&+$C/ I! *#'E& *#'E& B+$C/ aver bloc( shall be laid in pattern as specified by -ngineer n!%harge throughout the pavement. /nce the laying pattern has been established, it shall continue without without interruption over over the the enti entire re pave paveme ment nt surf surfac ace. e. %utt %uttin ing g of bloc bloc(s (s,, the the use use of infi infill ll conc concre rete te or discontinuities in laying pattern is not to be permitted in other than approved locations by -%. aving units shall be placed on the compacted sand bed to the nominated laying pattern, care shall be ta(en to maintain the specified bond throughout the 0ob. The first row shall be located ne't to an edge restraint. *pecially manufactured edge paving units are permitted or edge units may be cut using a power saw, a mechanical or hydraulic guillotine, bolster or other approved cutting machine. o hapha&ardly bro(en pavers shall be used.
aver bloc( shall be placed with the help of spacers to achieve gaps nominally 2 to "mm wide between ad0acent paving 0oints. o 0oint shall be less than 2mm nor more than 4mm. owever it is recommended to use ".mm wide spacer while laying paver tiles so as to ensure uniform ".mm gap between ad0acent pavers. 3reuent use of string lines shall be used to chec( alignment. n this regard, the laying face6 shall be chec(ed at least every two metre as the face proceeds. *hould the face become out of alignment, it must be corrected prior to initial compaction and before further laying 0ob is proceeded with. n each row, all full units shall be laid first. %losure units shall be cut and fitted subseuently. *uch closure units shall consist of not less than 25) of a full unit. To fill spaces between 25mm and 5mm wide, concrete having minimum 112 cement sand coarse aggregate mi' and a strength of 4 8*mm shall be used. ithin such mi' the nominal aggregate si&e shall not e'ceed one third the smallest dimension of the infill space. 3or smaller spaces dry pac(ed mortar shall be used. -'cept where it is necessary to correct any minor variation occurring in the laying bond, the paver bloc( shall not be hammered into position. here ad0ustment of position is necessary care shall be ta(en to avoid premature compaction of the sand bedding.
II.I#+ C$M*#C.I$ +fter laying the paver bloc(, they shall be compacted to achieve consolidation of the sand bedding and brought to design levels and profiles by not less than two :2; passes of a suitable plate compactor. The compactor shall be a high!freuency, low amplitude mechanical flat plate vibrator having plate area sufficient to cover a minimum of twelve paving units. rior to compaction all debris shall be removed from the surface. %ompaction shall proceed as closely as possible following laying and prior to any traffic. %ompaction shall not, however, be attempted within one meter of the laying face. %ompaction shall continue until lipping has been eliminated between ad0oining units.
1$I. -I++I! #D -I#+ C$M*#C.I$ +s soon as practical after compaction and in any case prior to the termination of wor( on that day and prior to the acceptance of any traffic, sand for 0oint filling shall be spread over the pavement.
75 microns 1!2 The %ontractor shall supply a sample of the 0ointing sand to be used in the contract prior to delivering any such material to site for incorporation into the wor(s. %ertificates of test results issued by a recognised testing laboratory confirming that the sand sample conforms to the reuirements of this specification shall be submitted prior to supply of total volume reuired. The 0ointing sand shall be broomed to fill the 0oints. -'cess sand shall then be removed from the pavement surface and the 0ointing sand shall be compacted with not less than one :1; pass of the plate vibrator and 0oints refilled with sand to full depth. This procedure shall be repeated until all 0oints are completely filled with sand. o traffic shall be permitted to use the pavement until all 0oints have been completely filled with sand and compacted. >oth the sand and paver bloc( shall be dry when sand is spread and broomed into the 0oints to prevent premature setting of the sand. The difference in level :lipping; between ad0acent units shall not e'ceed "mm with not more than 1) in any "m ? " m area e'ceeding 2mm. avement portions which are deformed beyond above limits after final compaction, shall be ta(en out and relaid to the satisfaction of the -ngineer in charge.
#ll other vis2alphysical 4 dimensional acceptance on parameters like aspect ratio5 s62areness etc to be as per I"789:9;<00: ED!E &E".&#I. %"I! /E&B B+$C/ -dge restraints shall be done using the (erb bloc(s as specified in ".9.They should be fi'ed properly to withstand overriding by the anticipated traffic, thermal e'pansion and to prevent loss of the laying course material from beneath the surface course. The edge restraint should present a vertical face down to the level of the underside of the laying course. The surface course should not be vibrated until the edge restraint, together with any bedding or concrete haunching, has gained sufficient strength. t is essential that edge restraints are adeuately secured. #.7 %I-$&M I.E&+$C/I! "*#CE" The pavers should have uniform interloc(ing space of 2mm to "mm to ensure compacted sand filling after vibration on the paver surface. #.$ "/I++ED +#B$%& *(illed labour should be employed for laying bloc(s to ensure line and level of pavers, desired shape of the surface and adeuate compaction of the sand in the 0oints.
=> +aying *attern @ed and Arey avers in %ombination of 1 red line and 2 grey lines to be laid at 45 degree to road from the ingress side.
