Home>ASTM Standards>ASTM D5898-96(R2021) pdf free download

ASTM D5898-96(R2021) pdf free download

ASTM D5898-96(R2021) pdf free download.Standard Guide for Standard Details for Adhered Sheet Waterproofing
6. Protection
6.1 Protection materials are required over all waterproofing to prevent damage from backfill, reinforcing chairs, and construction traffic, unless the membrane system incorporates an integral protection layer. Protection also is required where membranes terminate above grade and may be exposed to ultraviolet light. 6.2 Materials for protection include: asphalt composition boards, plastic drainage panels, low-density expanded polysty- rene boards, and extruded polystyrene insulation. Low-density expanded polystyrene boards and some types of plastic drain- age panels are not suitable for protection on horizontal sur- faces. Protection materials are loose-laid on horizontal mem- branes and attached to vertical membranes with compatible adhesives. They should be installed as soon as possible after the membrane, or each portion of it, is completed or water tested.
7. Reinforcement
7.1 Reinforcement is required for built-up and modified bitumen membranes at transitions, such as internal and external corners and at static concrete construction joints and cracks. Reinforcement also is required where reinforcing bars, pipes, and conduits penetrate the membrane. Separate reinforcement generally is not required for polymeric and vulcanized elasto- meric membranes. 7.2 Reinforcement usually is installed before the membrane but may be applied over it. Refer to the membrane manufac- turer for details. 7.3 The minimum reinforcement is one ply. Systems using a multiple-ply membrane usually require two or more reinforce- ment plies, whereas single-ply modified bitumen systems generally require one. 7.4 When additional plies are used as reinforcement, they should extend at least 150 mm [6 in.] beyond the corner or penetration and each succeeding ply should extend 75 mm [3 in.] beyond the previous ply. 7.5 Where reinforcing bars penetrate waterproofing, such as at rock anchors and wall-to-slab transitions, they should be sealed with reinforcing plies finger cut around the bars or liquid-applied membrane or both.7.6 Some manufacturers require cementitious cants or a liquid-applied waterproofing or mastic fillet at reentrant angles, chamfered external corners, and other special conditions to be implemented during construction. These should be indicated on project details. 7.7 Details should recognize the normal sequencing of construction. Foundation walls may be cast before or after slabs on grade. Structural slabs are cast after walls. Water- proofing of individual elements frequently follows this sequence, for example, walls are waterproofed before the structural slab is cast. The resultant cold joints may be dynamic.
8. Penetrations
8.1 Flashing at penetrations should accommodate differen- tial movement between the slab and the pipe, conduit, or drain. For built-up and modified bitumen membranes, lead reinforc- ing is recommended where pipes or drains are installed in sleeves but is optional where they are cast into the wall or slab. Cast iron drains, cast into the slab with flanges flush with or slightly below the slab, are preferred. Additional plies of reinforcement should be installed at drains. 8.2 Wearing courses on plaza decks move differentially from the structural slab. To prevent damage to the drainage system or flashing rupture from this movement, drains should be installed in the structural slab with inlets in the wearing course divorced from the drain body.
9. Expansion Joints
9.1 Structural expansion joints should be designed to permit independent movement of structural elements on each side of the joint. Control joints should be located to permit non- reversible movement and may be dynamic. The size and location of expansion and control joints should be determined by the structural engineer. Expansion joint covers should be designed to maintain continuity at all changes in plane. They should be designed to prevent displacement when subjected to water pressure. Where they occur in elevated slabs, they should be raised above the surface. Control joints are not detailed as expansion joints but should be reinforced in all membrane systems.

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