Methods for sealing cracks and expansion joints comprising the use of an adhesion promoter. In certain embodiments, the adhesion promoter comprises a vinyl polymer.

An expansion joint seal includes a seal body and a plurality of seal caps, wherein the seal body is made of a material having a first hardness, and the seal caps are made of a material having a second hardness that is greater than the first hardness. The seal body includes a plurality of walls that form hollow cells. The seal body includes a plurality of traffic bearing surfaces that are separated from one another by grooves and are thereby discontinuous relative to one another. The hollow cells and the grooves allow the seal body to expand and contract as an expansion joint increases and decreases in size due to thermal and/or load variations. The seal caps cover the traffic bearing surfaces of the seal body, such that each of the traffic bearing surfaces of the seal body is covered by a separate one of the seal caps.

An expansion joint seal includes a seal body and a plurality of seal caps, wherein the seal body is made of a material having a first hardness, and the seal caps are made of a material having a second hardness that is greater than the first hardness. The seal body includes a plurality of walls that form hollow cells. The seal body includes a plurality of traffic bearing surfaces that are separated from one another by grooves and are thereby discontinuous relative to one another. The hollow cells and the grooves allow the seal body to expand and contract as an expansion joint increases and decreases in size due to thermal and/or load variations. The seal caps cover the traffic bearing surfaces of the seal body, such that each of the traffic bearing surfaces of the seal body is covered by a separate one of the seal caps.

A method for relieving vaulted expansion of a cement-stabilized base layer through precut seams. The method firstly establishes an RBFN model according to a large number of observation results of a vaulted expansion amount of the cement-stabilized base layer under different conditions (such as temperature and a stress release structure) in Xinjiang and similar regions; and on such a basis, the vaulted expansion amount of the cement-stabilized base layer to be designed is predicted. When the vaulted expansion amount is greater than a control requirement, the RBFN model is configured to design a reasonable width and a reasonable interval of the precut wide expansion seams to ensure that the vaulted expansion amount of the cement-stabilized base layer is less than a control value. Based on the design of the RBFN model, the present invention provides a corresponding construction method for the precut wide expansion seams. The present invention can predict the vaulted expansion of the cement-stabilized base layer without precut seams according to existing data.

A method for relieving vaulted expansion of a cement-stabilized base layer through precut seams. The method firstly establishes an RBFN model according to a large number of observation results of a vaulted expansion amount of the cement-stabilized base layer under different conditions (such as temperature and a stress release structure) in Xinjiang and similar regions; and on such a basis, the vaulted expansion amount of the cement-stabilized base layer to be designed is predicted. When the vaulted expansion amount is greater than a control requirement, the RBFN model is configured to design a reasonable width and a reasonable interval of the precut wide expansion seams to ensure that the vaulted expansion amount of the cement-stabilized base layer is less than a control value. Based on the design of the RBFN model, the present invention provides a corresponding construction method for the precut wide expansion seams. The present invention can predict the vaulted expansion of the cement-stabilized base layer without precut seams according to existing data.

Techniques for protecting joints in pavement structures include applying a hardener/densifier to one or more surfaces that define a joint in a pavement structure and, optionally, to portions of one or more surfaces that are located adjacent to the joint. One or more other compounds, such as hydrophobic materials, water resistant materials, anti-scaling compounds, anti-wear compounds, multi-functional blended compositions and the like, may also be applied to the surfaces that define a joint and/or to portions of one or more surfaces that are adjacent to the joint. A seal may also be formed in a joint in a pavement structure.

Techniques for protecting joints in pavement structures include applying a hardener/densifier to one or more surfaces that define a joint in a pavement structure and, optionally, to portions of one or more surfaces that are located adjacent to the joint. One or more other compounds, such as hydrophobic materials, water resistant materials, anti-scaling compounds, anti-wear compounds, multi-functional blended compositions and the like, may also be applied to the surfaces that define a joint and/or to portions of one or more surfaces that are adjacent to the joint. A seal may also be formed in a joint in a pavement structure.

A free movement, arris protection, construction joint has a pair of arris protection members formed complementarily from strips of sheet with a continuous trapezium wave form. A divider one of the members is typically 100 mm deep for a nominal 0.1 m deep slab. The other one is typically 50 mm deep. The members are of steel plate. The wave form is comprised of flanges extending in the length of the joint and of webs angled to the flanges and the length of the joint. The flanges are spaced on opposite sides of a mid-plane of the joint. The members are bolted together with flangible nylon bolts, with their top (in use) edges flush. Welded to the outer ones of the flanges are L strips having apertures in their flats extending from the flanges for anchoring the joint to its slabs.

A free movement, arris protection, construction joint has a pair of arris protection members formed complementarily from strips of sheet with a continuous trapezium wave form. A divider one of the members is typically 100 mm deep for a nominal 0.1 m deep slab. The other one is typically 50 mm deep. The members are of steel plate. The wave form is comprised of flanges extending in the length of the joint and of webs angled to the flanges and the length of the joint. The flanges are spaced on opposite sides of a mid-plane of the joint. The members are bolted together with flangible nylon bolts, with their top (in use) edges flush. Welded to the outer ones of the flanges are L strips having apertures in their flats extending from the flanges for anchoring the joint to its slabs.

A method of manufacturing a concrete substrate includes placing a first concrete layer on a support base configured to support the concrete substrate, positioning a concrete slab load transfer apparatus on a top surface of the first concrete layer, wherein the top surface of the first concrete layer supports the concrete slab load transfer apparatus, and placing a second concrete layer on the top surface of the first concrete layer such that the second concrete layer covers the concrete slab load apparatus.