Biomaterial Database

Determining the physical properties of polymer in different admixtures used for self-compacting cement paste by ESEM. 2020

Murat Gökçe

Faculty of Architecture, Amasya University, Amasya 05100, Turkey. Electronic address: murat.gokce@amasya.edu.tr.

The aim of this study is to determine the physical properties of the polymer in plasticizers used for self-compacting cement pastes by environmental scanning electron microscopy (ESEM) method. Images of fresh cement paste containing cement, water, and plasticizer prepared by using 3 different types of plasticizer were examined by ESEM. Lignosulfonate-based, naphthalene sulfonate-based, and polycarboxylate-based plasticizers were added to the cement paste at a rate of 1% by weight of the cement. Images of the fresh cement pastes were obtained using ESEM within the first 3-5 min after mixing. As a result, the presence of electrostatic and steric effect forces of cement pastes prepared with the polycarboxylate-based additive was determined by ESEM analysis. In the ESEM analysis of the self-compacting cement paste, the diameter of the polymer that forms the steric force effect of the polycarboxylate-based additive was measured as 100-160 nm and the polymer length was 1-2 μm. The presence of an electrostatic force was determined from the brightness around the cement particles by ESEM image analysis.

UI	MeSH Term	Description	Entries
D008031	Lignin	The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed)	Lignins
D008855	Microscopy, Electron, Scanning	Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.	Scanning Electron Microscopy,Electron Scanning Microscopy,Electron Microscopies, Scanning,Electron Microscopy, Scanning,Electron Scanning Microscopies,Microscopies, Electron Scanning,Microscopies, Scanning Electron,Microscopy, Electron Scanning,Microscopy, Scanning Electron,Scanning Electron Microscopies,Scanning Microscopies, Electron,Scanning Microscopy, Electron
D009281	Naphthalenes	Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical synthesis, as insect repellents, fungicides, lubricants, preservatives, and, formerly, as topical antiseptics.
D011108	Polymers	Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).	Polymer
D003252	Construction Materials	Supplies used in building.	Building Materials,Building Material,Construction Material,Material, Building,Material, Construction,Materials, Building,Materials, Construction
D055672	Static Electricity	The accumulation of an electric charge on a object	Electrostatic,Electrostatics,Static Charge,Charge, Static,Charges, Static,Electricity, Static,Static Charges