초록 ▼

The invention relates to a two-part insertion member for use in the production of contraction or warping joints in continuously laid concrete slabs. The insertion member comprises a rigid lower part (to act as crack-inducing fillet) and a flexible upper part (to act as a sealing member) connected to

The invention relates to a two-part insertion member for use in the production of contraction or warping joints in continuously laid concrete slabs. The insertion member comprises a rigid lower part (to act as crack-inducing fillet) and a flexible upper part (to act as a sealing member) connected together, the lower part including an upstanding section which extends close to the uppermost extremity of the member. The invention also includes a method of forming sealed joints in concrete slabs.

대표청구항 ▼

An insertion member for use in the construction of concrete slabs, comprising a first elongated element of rigid synthetic plastic material having an upper and a lower portion each extending longitudinally of said first eLement, said first element diverging in direction from said lower to said upper

An insertion member for use in the construction of concrete slabs, comprising a first elongated element of rigid synthetic plastic material having an upper and a lower portion each extending longitudinally of said first eLement, said first element diverging in direction from said lower to said upper portion, said upper portion being formed with shoulder region and with an upstanding reinforcing plate extending upwardly beyond said shoulder region, said plate being separated from said shoulder region by a pair of slits extending longitudinally of said first element; and a second elongated element of resiliently yieldable material including a bifurcated web extending longitudinally of said second element and having a top end and a pair of limbs extending downwardly from said top end and each having a lower end formed with a laterally extending rib, and a pair of hollow sections laterally flanking said web adjacent said top end thereof, said first and second elements being so connected that said second element straddles said reinforcing plate of said first element and said ribs of said limbs are received in said slits, respectively, so that said plate extends toward the uppermost part of the insertion member and so that, when said hollow sections are evacuated and collapsed against said reinforcing plate for insertion of the insertion member between the slabs, said reinforcing plate reinforces said hollow sections and said shoulder region protects the same from below during said insertion.