Mechanical Characterization of Low Modulus Polymer-Modified Calcium-Silicate-Hydrate (C-S-H) Binder

Starr, J.; Soliman, E. M.; Matteo, E. N.; Dewers, T.; Stormont, J. C.; Reda Taha, M. M.

doi:10.1016/j.cemconcomp.2021.104219

Mechanical Characterization of Low Modulus Polymer-Modified Calcium-Silicate-Hydrate (C-S-H) Binder

Journal Article · Sat Aug 21 00:00:00 EDT 2021 · Cement and Concrete Composites

DOI:https://doi.org/10.1016/j.cemconcomp.2021.104219· OSTI ID:1820422

Starr, J. ^[1]; Soliman, E. M. ^[2]; Matteo, E. N. ^[3]; Dewers, T. ^[3]; Stormont, J. C. ^[1]; Reda Taha, M. M. ^[1]

Univ. of New Mexico, Albuquerque, NM (United States)
Assiut Univ., (Egypt)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Calcium-silicate-hydrate (C-S-H) represents a key microstructural phase that governs the mechanical properties of concrete at a large scale. Defects in the C-S-H phase are also responsible for the poor ductility and low tensile strength of concrete. Manipulating the microstructure of C-S-H can lead to new cementitious materials with improved structural performance. This paper presents an experimental investigation aiming to characterize a new synthetic polymer-modified synthetic calcium-silicate-hydrate (C-S-H)/styrene-butadiene rubber (SBR) binder. The new C-S-H/SBR binder is produced by calcining calcium carbonate and mixing this with fumed silica (SiO₂), deionized water and SBR. Mechanical, physical, chemical and microstructural characterization was conducted to measure the properties of new hardened C-S-H binder. Results from the experimental investigation demonstrate the ability to engineer a new C-S-H binder with low elastic modulus and improved toughness and bond strength by controlling the SBR content and method of C-S-H synthesis. The new binder suggests the possible development of a new family of low-modulus silica-polymer binders that might fit many engineering applications such as cementing oil and gas wells.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003525

OSTI ID:: 1820422

Alternate ID(s):: OSTI ID: 1868830

Report Number(s):: SAND--2021-10412J; 699026

Journal Information:: Cement and Concrete Composites, Journal Name: Cement and Concrete Composites Vol. 124; ISSN 0958-9465

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
binder
calcium silicate hydrate (C-S-H)
polymers
wellbore integrity

Mechanical Characterization of Low Modulus Polymer-Modified Calcium-Silicate-Hydrate (C-S-H) Binder

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