Abstract: A method of optimizing a concrete pavement design including estimating conditions of the pavement, determining properties of the pavement and developing a concrete pavement system. The method may further include selecting a thickness for the system, predicting performance of the system, determining costs of the system, and optimizing the pavement design based on one or more considerations. The method may include iterating one or more considerations. An optimized pavement system having predetermined design parameters.

Abstract: A device is provided for accelerating and propelling whole tires into the combustion zone of a kiln. More specifically, the device comprises an upper accelerating assembly and a lower accelerating assembly for providing approximately constant exit velocity to a whole tire regardless of its size or weight.

Abstract: A method of optimizing a concrete pavement design including estimating conditions of the pavement, determining properties of the pavement and developing a concrete pavement system. The method may further include selecting a thickness for the system, predicting performance of the system, determining costs of the system, and optimizing the pavement design based on one or more considerations. The method may include iterating one or more considerations. An optimized pavement system having predetermined design parameters.

Abstract: A rapid hardening hydraulic cement is provided that is made substantially exclusively from a subbituminous fly ash with no portland cement or other strengthening aid.

Abstract: A method and apparatus are disclosed for reducing total NOx emissions from a cement kiln. The method includes the step of injecting water into the flame of the kiln at a point proximate the initial ignition point of the burner. The apparatus includes an injection nozzle for injecting water into the burner flame. Also disclosed is an improved process for making cement clinker. The process includes the steps of burning fuel to generate a flame within a kiln, injecting water into the flame to control formation of nitrogen oxides within the kiln, introducing a mixture of cement raw materials into the kiln, and reacting the raw materials to form cement clinker.

Abstract: A rapid hardening hydraulic cement is provided that is made substantially exclusively from a subbituminous fly ash with no portland cement or other strengthening aid.

Abstract: A process is disclosed for converting low reactive fly ash to a highly reactive pozzolanic material by heating the fly ash until at least a portion of the fly ash melts; then rapidly cooling the fly ash. The resulting vitrified fly ash has improved cementitious properties relative to untreated fly ash.

Abstract: The invention in its various embodiments includes an apparatus and a method for improving combustion in a cement kiln system. The apparatus in one embodiment includes a precalciner and an oxygen source coupled to the precalciner. The method in one embodiment includes introducing oxygen into the precalciner of a cement kiln system.

Abstract: The invention in its various embodiments includes an apparatus and a method for improving combustion in a cement kiln system. The apparatus in one embodiment includes a precalciner and an oxygen source coupled to the precalciner. The method in one embodiment includes introducing oxygen into the precalciner of a cement kiln system.

Abstract: The invention in its various embodiments includes an apparatus and a method for improving combustion in a cement kiln system. The apparatus in one embodiment includes a precalciner and an oxygen source coupled to the precalciner. The method in one embodiment includes introducing oxygen into the precalciner of a cement kiln system.