Preparation of Surface. Immediately prior to placing aggregate base course, the previously constructed underlying surface course shall be cleaned of all foreign substances; if the surface of the underlying material has been damaged after placement or has inadequate compaction or other deviations from this contract specification requirements, such defects shall be repaired immediately prior to placement of this course.
Preparation of Surface. All putlog holes in brick work and junction between concrete and brick work shall be properly filled in advance. Joints in brick work shall be raked about 10mm and concrete surface hacked to provide grip to the plaster. Projecting burrs of mortar formed due to gaps at joints in shuttering shall be removed. The surface shall be scrubbed clean with wire brush/coil brush to remove dirt, dust etc. and the surface thoroughly washed with clean water to remove efflorescence, grease and oil etc. and shall be kept wet for a minimum of six hours before application of plaster.
Preparation of Surface. Immediately before applying the bituminous Material, the surface to be sealed shall be cleaned of all foreign and loose Material. T-811-2
Preparation of Surface. All PPC patches which are placed during the same work shift the overlay is placed only require a minimum 15 minute cure time before application of the resin primer and placement of the PPC overlay and do not require additional surface preparation prior to application of the resin primer. Any PPC patches which are not placed during the same work shift the overlay is placed require additional (shotblast or sandblast) surface preparation prior to application of the resin primer. Patch area preparation requires removal only to sound concrete. The requirement to remove concrete beneath the bonded top mat of reinforcement is waived only for partial depth Polyester Polymer Concrete Patching, unless the concrete beneath the reinforcement is deteriorated or unsound.
Preparation of Surface. Before plastering, masonry joints are to be raked out. Mortar powder and dust shall be brushed out from joints, and the surface shall be washed with clean water and shall be watered well. Cement slurry shall be applied to R.C.C. surface before plastering. The minimum thickness or mortar to be applied shall be as specified. To ensure proper thickness, gauged patches shall be made at
Preparation of Surface. Immediately prior to applying the slurry, the Contractor shall clean the trail surface of all loose material, silt spots, vegetation, and any other matter, which may adversely affect the adherence of the slurry to the existing pavement. The Contractor shall be responsible for sweeping all parking lot sections to be slurried with a mechanical power broom prior to sealing. The Project Manager may require particularly dirty parking lot sections to be flushed with water. The Project Manager must approve all flushing operations. The Contractor shall be responsible for cleaning sidewalks soiled by flushing operations. The Contractor shall be responsible for removing all traffic striping, markings and raised pavement markers prior to the slurry seal operation. Also see Section “Parking Lot Stripe, Pavement Markings and Curb Painting” found elsewhere in this “Exhibit A, Scope and Services” for the removal of existing traffic striping. All materials removed become the property of the Contractor and shall be disposed of in accordance with the provision of 7-1.13, “Disposal of Material Outside the Highway Right of Way“, in the State Standard Specifications. The Contractor shall be responsible for locating, covering, removing, cleaning and protecting all utility covers, maintenance hole covers, water valve boxes, and any other utility covers. All manholes, utility, and survey monument covers encountered in the area to be resurfaced shall be carefully referenced out prior to the resurfacing operations by the Contractor. The methods of protection, referencing, locating, and cleaning shall be subject to approval by the Project Manager prior to any resurfacing. All protective coverings shall be removed before opening the parking lot to traffic. Placing The slurry seal shall be placed at a rate of approximately twelve (12) to fifteen (15) pounds per square yard. The exact rate shall be as determined by specific weight of aggregate, the surface demand of the pavement, and size of the largest particle size of the aggregate. The slurry seal shall not be placed when the existing pavement or air temperature is below 55 degrees Fahrenheit (55°F) and falling, or during unsuitable weather, but may be applied when both pavement and air temperature are above 45 degrees Fahrenheit (45°F) and rising. When slurry starts or finishes, a straight-line cut-off shall be obtained by laying down a strip of building paper or other approved material. The Contractor shall remove such paper and a...
Preparation of Surface. The exterior wall is completely free from all dust, loose paint and fungus. Clean the wall thoroughly using wire brush and water and sand paper if necessary. Pay special attention to the tops of parapets and other horizontal surfaces where fungus is most likely to grow.
Preparation of Surface. The joints in the masonry shall be raked out to a depth not less than the width of the joint or as directed when the mortar is green. Joints shall be brushed clean of dust and loose particles with a stiff brush. The area shall then be washed and the joint thoroughly wetted before pointing is commenced.
Preparation of Surface. The joints of the brickwork shall be racked out to a depth of at least 15 mm. In case of R.C.C walls, the surface shall be hacked and roughened with wire brushes. The surface shall be cleaned thoroughly washed with water and kept wet.
Preparation of Surface. The joints shall be raked out properly. Dust and loose mortar shall be brushed out. Efflorescence if any shall be removed by brushing and scrapping. The surface shall then be thoroughly washed with water, cleaned and kept wet before plastering is commenced. In case of concrete surface if a chemical retarder has been applied to the form work, the surface shall be roughened by wire brushing and all the resulting dust and loose particles cleaned off and care shall be taken that none of the retarders is left on the surface Mortar: The mortar of the specified mix using the type of sand described in the item shall be used. It shall be as specified in Subhead 3.0. For external work and under coat work, the fine aggregate shall conform to grading IV. For finishing coat work the fine aggregate conforming to grading zone V shall be used. Application of Plaster: Ceiling plaster shall be completed before commencement of wall plaster. Plastering shall be started from the top and worked down towards the floor. All putlog holes shall be properly filled in advance of the plastering as the scaffolding is being taken down. To ensure even thickness and a true surface, plaster about 15 × 15 cm shall be first applied, horizontally and vertically, at not more than 2 metres intervals over the entire surface to serve as gauges. The surfaces of these gauged areas shall be truly in the plane of the finished plaster surface. The mortar shall then be laid on the wall, between the gauges with trowel. The mortar shall be applied in a uniform surface slightly more than the specified thickness. This shall be brought to a true surface, by working a wooden straight edge reaching across the gauges, with small upward and side ways movements at a time. Finally the surface shall be finished off true with trowel or wooden float according as a smooth or a xxxxx granular texture is required. Excessive troweling or over working the float shall be avoided. All corners, arrises, angles and junctions shall be truly vertical or horizontal as the case may be and shall be carefully finished. Rounding or chamfering corners, arrises, provision of grooves at junctions etc. where required shall be done without any extra payment. Such rounding, chamfering or grooving shall be carried out with proper templates or battens to the sizes required. When suspending work at the end of the day, the plaster shall be left, cut clean to line both horizontally and vertically. When recommencing the plastering, the edge of...
