Results 11 to 20 of about 7,786 (229)

Microshear Bond Strength of Composite Resin to Mineral Trioxide Aggregate and Potassium Nitrate-Modified Polycarboxylate Cement at Two Time Points Using Different Adhesive Approaches: An In Vitro Study. [PDF]

open access: yesClin Exp Dent Res
ABSTRACT Objectives This in vitro investigation evaluated the microshear bond strength (µSBS) of composite resin to mineral trioxide aggregate (MTA) and a modified polycarboxylate cement containing potassium nitrate (PCC/KNO3), both utilized as pulpotomy materials.
Adl A   +3 more
europepmc   +2 more sources

Preparation and properties of allyl ether-based polycarboxylate superplasticizer with short-branched chains modified by nano-silica

open access: yesJournal of Chemical Research, 2022
The combination of nanoparticles and polycarboxylate ether superplasticizers is expected to simultaneously improve the durability and mechanical properties of mortar and concrete.
Lei Qiu   +7 more
doaj   +1 more source

Dispersing Effect of Core Cross-linked Star Polycarboxylate Superplasticizers on the Cement Paste [PDF]

open access: yesE3S Web of Conferences, 2021
Researches on topological modification of polycarboxylate superplasticizers to improve the water-reducing or slump-retainning properties have been a hot topic in rencent years. Herein, a core crosslinked star polycarboxylate superplasticizers (SPCE) were
Zhang Jinlong   +4 more
doaj   +1 more source

Effect of Resin Coating on Dentin Bond Strength Under Immediate and Delayed Cementation Protocols. [PDF]

open access: yesJ Esthet Restor Dent
ABSTRACT Objective This study aimed to evaluate the effects of resin coatings on bond strength using immediate and delayed cementation protocols. Materials and Methods One hundred twenty dentin specimens were assigned to four groups: Noncoated, TK– 100B (a novel single‐bottle adhesive), Hybrid Coat II, and Clearfil SE bond 2.
Takahashi R   +4 more
europepmc   +2 more sources

Effect of Graphene Oxide Nanosheets on Physical Properties of Ultra-High-Performance Concrete with High Volume Supplementary Cementitious Materials [PDF]

open access: yes, 2020
Nanomaterials have been increasingly employed for improving the mechanical properties and durability of ultra-high-performance concrete (UHPC) with high volume supplementary cementitious materials (SCMs).
Lambert, Paul   +4 more
core   +1 more source

Microleakage at implant abutment and prosthesis interface in cemented implant-supported prosthesis

open access: yesJournal of Pharmacy and Bioallied Sciences, 2021
Background: Dental implants have an important role in mainstream dental practice today to restore esthetics. The present study was conducted to evaluate the microleakage at implant abutment and prosthesis interface in cemented implant-supported ...
Soni Kumari   +5 more
doaj   +1 more source

Tailored setting times with high compressive strengths in bassanite calcium sulfoaluminate eco-cements [PDF]

open access: yes, 2016
This work deals with the hydration of a calcium sulfoaluminate (CSA) eco-cement prepared with bassanite and different additives (type and content) at a fixed water/CSA ratio of 0.5.
Cabeza-Diaz, Aurelio   +6 more
core   +2 more sources

Utilization of Poly(Polyvinyl Alcohol-g-2-Ethylhexyl Acrylate) as Admixture for Mortar [PDF]

open access: yes, 2020
We investigated the physico-mechanical properties of mortar mixed with copolymers based on polyvinyl alcohol (PVA) and 2-ethylhexyl acrylate (2-EHA) and synthesized by grafting using ammonium persulfate (APS) as an initiator.
Bekbayeva, Lyazzat   +3 more
core   +1 more source

Research on the performance of recycled concrete powder self-leveling mortar based on orthogonal experiment [PDF]

open access: yesE3S Web of Conferences, 2020
Waste concrete in the construction waste is reprocessed into concrete sand and powder [1]. Recycled concrete sand with a particle size between 0.15 and 0.25mm partially replaces natural sand, and the recycled concrete powder with a particle size less ...
Lin Yuezhong   +2 more
doaj   +1 more source

Low-heat steaming treatment of concrete with polycarboxylate superplasticizers

open access: yesMagazine of Civil Engineering, 2021
Recommendations for quantity of polycarboxylate water-reducing admixtures, for the properties of Portland cement as well as the curing regimes is presented in order to reduce the Portland cement amount, to improve the transfer and design strength and ...
Olga Smirnova
doaj   +1 more source

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