Carboncure Technologies, Inc.

W. R. Grace Co.-conn.

Calmetrix, Inc.

Paul J Sandberg

George Sean Monkman

Dean Paul Forgeron

Joshua Jeremy Brown

Kevin Cail

Mark MacDonald

David F Myers

Neal Steven Berke

Josephine H Cheung

Robert Niven

Olafur H Wallevik

Robert A Wiercinski

Lawrence L Kuo

Felek Jachimowicz

Lawrence R Roberts

Jyoti Seth

Denise A Silva

Sergey Liberman

Frank G Serafin

Peter V Coveney

Mark Macdonald

Durga V Subramanian

Stanislav Elektrov

Marc Zacharias

John L Gallagher

Joanna D Blanchard

Jay Crossman

The invention provides methods and compositions for treating wash water from concrete production with carbon dioxide. The treated wash water can be reused as mix water in fresh batches of concrete.

Methods and compositions for treatment of concrete wash water

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

Apparatus for delivery of carbon dioxide to a concrete mix in a mixer and determining flow rate

Apparatus for delivery of a predetermined amount of solid and gaseous carbon dioxide

The invention provides compositions and methods directed to carbonation of a cement mix during mixing. The carbonation may be in a stationary mixer or a transportable mixer, such as a drum of a ready-mix truck.

Methods and compositions for concrete production

The invention provides methods and compositions for carbonation of cement mixes using pressurized carbon dioxide delivered to the mix.

Carbonation of cement mixes

The invention provides compositions and methods directed to carbonation of a cement mix during mixing. The carbonation may be controlled by one or more feedback mechanisms to adjust carbon dioxide delivery based on one or more characteristics of the mix or other aspects of the mixing operation.

A thermal energy measurement system is disclosed for use as a calorimeter capable of providing sample thermal energy measurements in selectable modes including isothermal and/or adiabatic modes. In some embodiments, the thermal energy system further comprises a closed-loop servo controller. In some embodiments, the thermal energy measurement system is capable of providing thermal energy measurements in semi-adiabatic and/or custom programmed modes. In some embodiments, the servo controller may be implemented as a feedback circuit whose process variable is either heat flow, sample temperature, a combination thereof, or a preprogrammed time dependence of the heat flow and/or sample temperature. The output of the servo controller may be used to drive a temperature control device such as but not limited to a thermoelectric module (TEM). Methods of thermal energy measurement are also disclosed.

Systems and methods of thermal energy measurement

Methods for delivery of carbon dioxide to a flowable concrete mix

Method for suppressing antagonistic hydration reactions in Portland fly ash cement involves the use of unponded fly ash that is pre-hydrated, preferably as an aqueous slurry wherein fly ash, preferably having an alkaline earth metal oxide of at least 10% by weight, is soaked, whereby the hydration reaction of the resultant mixed fly ash and cement is accelerated when these components are mixed together with water to hydrate the cement. Blended Portland cement/fly ash compositions of the invention will also have higher early strength as well as shorter set time compared to untreated blends.

Suppression of antagonistic hydration reactions in blended cements

Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resistance of the liquid to rotation of the device. Both rheological and calorimetric testing can be performed during mixing, which ensures uniformity of rheology and hence the accuracy of results.

Rheological and calorimetric testing method

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Beverly, MA, United States of America

Paul J Sandberg