Knowledge Tree
Cement
Facts (16)
Sources
Recent breakthroughs in the valorization of lignocellulosic biomass ... pubs.rsc.org Jun 7, 2025 12 facts
claimWollastonite microfibers contain calcium and silicon, which facilitate the formation of calcium-silicate-hydrate (C–S–H) gel in cement mixtures.
procedureManjunath et al. prepared a composite by mixing cement with Cashew Nutshell Ash (CNSA), which was processed through vigorous methods.
claimA sensitivity analysis using a Random Forest model determined that water and cement proportions are the key factors influencing the compressive strength of reinforced concrete, while the addition of coarse aggregates negatively affects compressive strength.
claimWang et al. reported in 2008 that incorporating up to 25% biomass fly ash into concrete provides compressive strength comparable to pure cement and coal fly ash composites for up to one year.
claimThe durability of concrete increases when biochar is added at a concentration of 0.5–2% of the weight of the cement.
measurementScioti et al. produced artificial construction blocks from stone waste by varying the amounts of sludge, water, cement, and compaction pressure, achieving compressive strengths ranging from 13.12 to 29.9 N mm−2, which met the threshold required for building construction.
procedureHempcrete is prepared by mixing hemp fibers with water, cement, and lime.
measurementMathew et al. demonstrated that increasing the Natural Rubber Latex (NRL) to cement ratio from 0.5% to 2% improved flexural strength from 3.83% to 10.62% and diminished porosity from 15.2% to 9.9%.
referenceHoyos, Zuluaga, Gañán, Pique, and Vazquez (2019) investigated the use of cellulose nanofibrils extracted from fique fibers as a bio-based additive for cement.
claimResearchers investigated a 233-sample database of cement-based materials, varying the proportions of cement, water, superplasticizers, silica fume, sand, and hydroxypropyl methylcellulose.
measurementCement and concrete composites typically require the addition of cellulose nano- or microfibers in amounts ranging from 0.05 to 1 weight percent for reinforcement purposes.
measurementThe addition of 0.005–0.030% cellulose nanofibrils (CNF) and 4.8% wollastonite microfibers to a mixture of 10% silica fume and 90% cement (by weight) improves compressive strength by 13% and flexural strength by over 30% compared to control mortar.
USTR Launches Broad Section 301 Investigations Into Excess ... dwt.com 2 days ago 1 fact
claimThe sectors targeted by the Section 301 investigation include aluminum, automobiles, batteries, cement, chemicals, electronics, energy goods, glass, machine tools, machinery, nonferrous metals, paper, plastics, processed food and beverages, robotics, satellites, semiconductors, ships, solar modules, steel, and transportation equipment.
Impact of carbon dioxide removal technologies on deep ... - Nature nature.com Jun 17, 2021 1 fact
claimThe 140% CO2 reduction cap is selected to approximate the carbon dioxide removal levels needed to offset difficult-to-decarbonize economy-wide CO2 emissions sources, such as iron/steel, cement, aviation, and shipping.
Advancing energy efficiency: innovative technologies and strategic ... oaepublish.com 1 fact
claimThe manufacturing of cement and steel can significantly reduce greenhouse gas emissions by transitioning to hydrogen instead of relying on carbon-intensive fuels.
Transitioning Away from Fossil Fuels - CEBRI cebri.org Sep 22, 2025 1 fact
claimHeavy transport and hard-to-abate industries, such as steel, cement, and petrochemicals, currently lack viable electrification alternatives due to economic or technical constraints.