Hardened cement paste microstructure as the main factor of concrete durability

Influence of hardened cement paste content on the water absorption of fine recycled concrete aggregates

Influence of hardened cement paste content on the water absorption of fine recycled concrete aggregates Zengfeng Zhao a b , Sébastien Remond a b , Denis Damidot a b & Weiya Xu c a Université Lille Nord de France , Lille , France b Civil and Environmental Engineering Department , Mines Douai, LGCgE GCE , Douai , France c Geotechnical Research Institute , Hohai University , Nanjing , China Publis...

Structure and Physical Properties of Hardened Portland Cement Paste

Upscaling Cement Paste Microstructure to Obtain the Fracture, Shear, and Elastic Concrete Mechanical LDPM Parameters

Modeling the complex behavior of concrete for a specific mixture is a challenging task, as it requires bridging the cement scale and the concrete scale. We describe a multiscale analysis procedure for the modeling of concrete structures, in which material properties at the macro scale are evaluated based on lower scales. Concrete may be viewed over a range of scale sizes, from the atomic scale ...

The Surface Area of Hardened Cement Paste as Measured by Various Techniques

Hydrated cement paste has a high specific surface area due almost entirely to the calcium-silicate-hydrate reaction product. The surface area of cement paste is closely related to many crucial properties, including strength and permeability, and is therefore a useful predictive measurement. It is also a useful parameter for studying the nature of the calcium-silicate-hydrate gel itself. Unfortu...

Determining the water - cement ratio , cement content , water content and degree 1 of hydration of hardened cement paste : Method development and validation on 2 paste samples

7 We propose a new method to estimate the initial cement content, water content and free water/cement ratio (w/c) 8 of hardened cement-based materials made with Portland cements that have unknown mixture proportions and 9 degree of hydration. This method first quantifies the composition of the hardened cement paste, i.e. the 10 volumetric fractions of capillary pores, hydration products and unr...