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Piscataway, NJ, United States

Ravikumar D.,Solidia Technologies | Neithalath N.,Arizona State University
Cement and Concrete Composites | Year: 2013

The chloride transport resistance of alkali silicate powder activated slag concretes is evaluated. Two different Na2O-to-source material ratios (n) and two SiO2-to-Na2O ratios of the activator (M s) are used on concretes proportioned using two slag contents (300 kg/m3 and 400 kg/m3). Rapid chloride permeability (RCP) and non-steady state migration (NSSM) tests are used to evaluate the chloride transport behavior. Alkali silicate powder activated concretes demonstrate comparable or better chloride transport resistance than OPC concretes when evaluated using RCP and NSSM tests. The relationships between the activator parameter, n·Ms, and the critical pore sizes (dcl) or the RCP and NSSM values demonstrate similar trends showing the influence of dc in determining the ionic transport response. Electrical impedance spectroscopy (EIS) is used to relate the material response before and after the transport tests, and equivalent circuit models are used to extract the parameters that relate to the pore structure. EIS coupled with circuit modeling clearly brings out the differences between the RCP and NSSM test on their influences in the microstructure of alkali activated slag concretes. © 2013 Elsevier Ltd. All rights reserved. Source

Solidia Technologies | Date: 2015-08-03

The invention provides novel carbonatable calcium silicate compositions and carbonatable calcium silicate phases that are made from widely available, low cost raw materials by a process suitable for large-scale production. The method of the invention is flexible in equipment and production requirements and is readily adaptable to manufacturing facilities of conventional cement. The invention offers an exceptional capability to permanently and safely sequesters CO

The invention provides compositions and methods for controlling setting of carbonatable calcium silicate compositions that are contaminated with hydrating materials. These carbonatable calcium silicate cements are suitable for use as non-hydraulic cement that hardens by a carbonation process and may be applied in a variety of concrete components in the infrastructure, construction, pavement and landscaping industries.

Solidia Technologies | Date: 2014-06-04

A method of preparing and rapidly curing a composite material having a thin cross section. The composite material includes a mixture of solid particles, at least some of which are a material that reacts with CO

The invention encompasses equipment used to condition a recirculating gas stream in order to cure a CO

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