Process for preparing a bituminous ground covering
AssigneeKibag Aktiengesellschaft Baggerei-Unternehmungen & Kieswerke am Zurichsee
InventorErnst Gallmann
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Abstract
A process for producing bituminous surfacing, bituminous surfacing produced y the process and hot plant mix for carrying out the process. To improve the resistance to fracture, the proposed bituminous surfacing contains metal fibers, for example steel fibers of finite length. These fibers can be admixed to the mix of solids mix and bituminous binder in the course of the preparation of the hot plant mix or in the course of laying the hot plant mix. Due to the compaction of the hot plant mix to form the bituminous surfacing, the metal fibres are bent and thus loop around the particles of the solids mix and/or form a network with one another to give a kind of random nonwoven fabric.
Claims16
A process for preparing a bituminous ground coating, said process comprising the steps of:
- admixing a solid particle mixture including a predetermined coarsest fraction to a bituminous binder in a flowable state to form a mix;
- admixing ether to said mix or to said solid particle mixture finite, generally straight metallic fibers having a length which corresponds at least to the mesh size of said coarsest fraction to obtain a fiber-containing mix;
- applying said fiber-containing mix on the ground to be covered to form a cover layer;
- and
- applying external pressure to compact said cover layer and deforming said fibers about said solid particles within said mix whereby the fibers entangle with said particles and with each other to enhance bonding between fiber containing solids and said binder.
A process for preparing a bituminous ground coating, said process comprising the steps of:
- admixing a solid particle mixture having a coarsest fraction to a bituminous binder in a flowable state to form a mix;
- admixing to said mix a percentage between 0.1% and 4% by weight of finite straight metallic fibers having a length which corresponds at least to the mesh size of said coarsest fraction to obtain a fiber-containing mix;
- applying said fiber-containing mix on the ground to be covered to form a cover layer;
- and
- applying external pressure to compact said cover layer and deforming said fibers about said solid particles within said mix whereby the fibers entangle with said particles and with each other to enhance bonding between fiber containing solids and said binder.
A process for preparing a bituminous ground coating, said method comprising the steps of:
- admixing a solid particle mixture having a predetermined coarsest fraction to a percentage between 0.1% and 4% by weight of finite straight metallic fibers having a length which corresponds at least to the mesh size of said coarsest fraction to obtain a fiber containing dry, solid particle mixture;
- admixing said solid particle mixture to a bituminous binder in a flowable state to form a fiber-containing mix;
- applying said fiber-containing mix on the ground to be covered to form a cover layer;
- and
- applying external pressure to compact said cover layer and deforming said fibers about said solid particles within said mix whereby the fibers entangle with said particles and with each other to enhance bonding between fiber containing solids and said binder.
Dependencies are inferred from the claim text.