Bentonite Waterproofing Membrane Swelling Control

The patent applies parameter changes by formulating a composite material where the swelling characteristics can be controlled through composition ratios. The membrane contains hydrophilic materials (like bentonite or superabsorbent polymers) mixed with a hydrophobic binder system, allowing the swelling response to be tuned by adjusting the proportion and type of swelling agents, thus resolving the contradiction between immediate swelling and pre-application trafficability

The patent implements preliminary action by providing a pre-applied waterproofing membrane that maintains its structural integrity and allows construction traffic before concrete casting. The membrane is designed to remain stable during the construction phase and only activate its swelling function after concrete placement, when water exposure occurs, thus enabling both trafficability and subsequent waterproofing performance

The patent resolves this contradiction by changing the swelling response parameters through controlled composition. By selecting specific hydrophilic materials and adjusting their concentrations relative to the hydrophobic binder, the membrane's swelling kinetics can be optimized to provide both immediate protection and long-term durability against environmental factors

The patent employs composite materials by combining hydrophobic binders with hydrophilic swelling agents in a specific formulation. This composite structure allows the membrane to exhibit controlled swelling behavior that provides immediate waterproofing protection while maintaining durability against rain and snow through the synergistic interaction of its components