An environmental evaluation of geopolymer based concrete production: reviewing current research trends

A review on ultra high performance concrete: Part I. Raw materials and mixture design

http://p30p30-cement.persiangig.com/cement/Environmental%20impact%20of%20cement%20production%20detail%20of%20the%20different%20processes%20and.pdf

Environmental impact of cement production: detail of the different processes and cement plant variability evaluation

http://www.bauchemie-tum.de/master-framework/data/dynamic/Image/53.pdf

Impact of zeta potential of early cement hydration phases on superplasticizer adsorption

At present, the cement industry generates approximately 5% of the world’s anthropogenic CO2 emissions. This share is expected to increase since demand for cement based products is forecast to multiply by a factor of 2.5 within the next 40 years and the traditional strategies to mitigate emissions, focused on the production of cement, will not be capable of compensating such growth. Therefore, additional mitigation strategies are needed, including an increase in the efficiency of cement use. This paper proposes indicators for measuring cement use efficiency, presents a benchmark based on literature data and discusses potential gains in efficiency. The binder intensity (bi) index measures the amount of binder (kg m−3) necessary to deliver 1 MPa of mechanical strength, and consequently express the efficiency of using binder materials. The CO2 intensity index (ci) allows estimating the global warming potential of concrete formulations. Research benchmarks show that bi ∼5 kg m−3 MPa−1 are feasible and have already been achieved for concretes >50 MPa. However, concretes with lower compressive strengths have binder intensities varying between 10 and 20 kg m−3 MPa−1. These values can be a result of the minimum cement content established in many standards and reveal a significant potential for performance gains. In addition, combinations of low bi and ci are shown to be feasible.

Measuring the eco-efficiency of cement use

Adsorption characteristics of superplasticizers on cement component minerals

Autogenous shrinkage of high-strength concrete containing silica fume under drying at early ages

This paper aims to provide common basis for the estimation of emission inventory data necessary for the evaluation of environmental impact of a concrete structure through its life cycle. Intensive literature survey and hearing to the institutes concerned have been deliberately conducted to collect relevant data to concrete materials, other materials involved, construction, demolition, and disposal and recycling. Consequently emission inventory data of CO2, SOx, NOx, and particulate matter were able to be prepared in an objective way. In addition, fundamental inventory data of these emission gases and particulate matter were provided for various kinds of energy. Furthermore most commonly used machines, instruments and other equipments on concrete structure construction are presented and provided for their related inventory data. In this way, inventory data regarding 91 detail items in total were able to be provided. By using these inventory data, four case studies where environmental impact caused by the construction of concrete structures was considered as a performance parameter of the structures similarly to serviceability, safety, and durability of the structures were also investigated based on design methods proposed previously by the authors in order to confirm the applicability of these inventory data to environmental performance evaluation of concrete structures.

/pdf/inventory-data-and-case-studies-for-environmental-2hbf4zekcm.pdf

Kenji Kawai

Papers

Adsorption characteristics of superplasticizers on cement component minerals

Autogenous shrinkage of high-strength concrete containing silica fume under drying at early ages

Inventory Data and Case Studies for Environmental Performance Evaluation of Concrete Structure Construction

Effects of porous ceramic roof tile waste aggregate on strength development and carbonation resistance of steam-cured fly ash concrete

Effect of silica fume on efflorescence formation and alkali leaching of alkali-activated slag