This study examines effects of cement fineness and chemical admixtures of early strength agents on the early strength development of concrete. Three cement types were selected, namely ASTM type-I ordinary Portland cement (OPC), fineness ordinary Portland cement (FOPC), and ASTM type-III early Portland cement (EPC), and the mixing proportions of concrete were set by adding a triethanolamine-based chemical admixture to FOPC. The evaluation items considered in this study included raw material analysis, compressive strength, and maturity (D∙h). The time required for the development of concrete strength of 5 MPa in the three cement types was estimated and compared. The results revealed that using FOPC enhances the strength development of concrete owing to its higher fineness and SO content compared to OPC. In addition, it has been observed that using both FOPC and TCA yields a similar performance to that observed using EPC, in light of the improved early strength development at low temperatures.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254219 | PMC |
| http://dx.doi.org/10.3390/ma13092027 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A comprehensive systemic review and meta-analysis of the association between lipid profile and hidradenitis suppurativa.
Arch Dermatol Res
January 2025
Department of Dermatology, Changhua Christian Hospital, Changhua, Taiwan.
Background: While several studies have suggested a connection between Metabolic Syndrome (MetS) and Hidradenitis Suppurativa (HS), a definitive analysis confirming the association between lipid abnormalities and HS based on actual lipid values is lacking. Previous research, using odds ratios from ICD codes, indicates links between elevated triglycerides and low high-density lipoprotein levels with HS. However, these findings may not fully represent real-life situations, as no comprehensive analysis using actual lipid measurements has been performed.
View Article and Find Full Text PDFSelective adsorption of unmethylated DNA on ZnO nanowires for separation of methylated DNA.
Lab Chip
January 2025
Department of Life Science and Technology, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8501, Japan.
DNA methylation is a crucial epigenetic modification used as a biomarker for early cancer progression. However, existing methods for DNA methylation analysis are complex, time-consuming, and prone to DNA degradation. This work demonstrates selective capture of unmethylated DNAs using ZnO nanowires without chemical or biological modifications, thereby concentrating methylated DNA, particularly those with high methylation levels that can predict cancer risk.
View Article and Find Full Text PDFCommon pitfalls in oncology drug applications aiming for conditional marketing authorization.
Br J Clin Pharmacol
January 2025
Parexel International, Durham, North Carolina, USA.
Early approval mechanisms, such as conditional approval in the EU, have been used extensively to provide timely access to therapeutic innovations to cancer patients with unmet medical needs. While based on promising early evidence, such approvals are challenging from many perspectives due to the lack of comprehensive data. The limitation typically relates to data that demonstrates clinical benefit via early endpoints and is only acceptable when the early evidence is particularly convincing to assume that the benefits of early access are greater than the potential harms.
View Article and Find Full Text PDFBiomimetic ECM nerve guidance conduit with dynamic 3D interconnected porous network and sustained IGF-1 delivery for enhanced peripheral nerve regeneration and immune modulation.
Mater Today Bio
February 2025
Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, 100044, China.
Recent advancements in tissue engineering have promoted the development of nerve guidance conduits (NGCs) that significantly enhance peripheral nerve injury treatment, improving outcomes and recovery rates. However, utilising tailored biomimetic three-dimensional (3D) topological porous structures combined with multiple bio-effect neurotrophic factors to create environments similar to neural tissues, regulate local immune responses, and develop a supportive microenvironment to promote peripheral nerve regeneration and repair poses significant challenges. Herein, a biomimetic extracellular matrix (ECM) NGC featuring an interconnected 3D porous network and sustained delivery of insulin-like growth factor-1 (IGF-1) is designed using multi-functional gelatine microcapsules (GMs).
View Article and Find Full Text PDFFruit Cuticle Thickness and Anatomical Changes in Pedicel Xylem Vessels Influence Fruit Transpiration and Calcium Accumulation in Cranberry Fruit.
Physiol Plant
January 2025
Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI.
Ca is a key nutrient for fruit quality due to its role in bonding with pectin in the cell wall, providing strength through cell-to-cell adhesion, thus increasing fruit firmness and extending post-harvest life. However, Ca accumulation is mostly limited to the initial stages of fruit development due to anatomical and physiological changes that occur as fruits develop. The objective of this study was to evaluate fruit transpiration, cuticle thickness, and pedicel vessel changes during cranberry fruit development and the effect these parameters might have on Ca translocation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!