نتایج جستجو برای: cement manufacture
تعداد نتایج: 43887 فیلتر نتایج به سال:
سیمانهای ژئوپلیمری دارای خواصی از جمله مقاومت بالا، زمان گیرش کوتاه تا طولانی، حجم تخلخل پایین می باشند که نقش مواد الکالی در این گونه مصارف، فعال سازی مواد زائد مانند سرباره کوره، خاکستر بادی و ... می باشد. این مواد بوسیله آلکالی ها فعال شده بطوریکه پیوند si-o را در سیلیس یا آلومیناسیلیکات شکسته و با انجام واکنش های دیگر مواد جدیدی بنام ژئوپلیمر تولید می نماید. پوزالان های طبیعی دسته ای از موا...
Through the environmental perspective of producing new construction materials with inclusion tailings or residues that improve their properties and, at same time, promote a practice mitigates impacts, objective this work is to diagnose effect incorporating scheelite- as recycled aggregate in soil-cement bricks, partially replacing soil, seeking make its use feasible interlocking pavements, well...
This study investigates the mechanical and thermophysical performance of cement mortars incorporating microencapsulated phase change materials (mPCMs), which consist an aqueous dispersion 100% bio-based fine core–shell particles. A specific protocol was used to manufacture mortar samples, ensures a homogeneous particle distribution prevents microcapsule leakage. The addition mPCMs causes both d...
The information obtained using the satellite technologies of remote sensing provides new massive knowledge about open pit mining operations at deposits carbonate rocks for manufacture cement in 26 regions Russia. number and haulage machines operating each individual mine within whole industry sector is determined. was used analytical estimation capacity overall potential production this sector....
This study was focused on the historical evolution of waste management policy carried out by Spanish industry devoted to titanium dioxide pigments manufacturing for minimising its environmental impact. challenge achieved modifying original chemical process and converting originally dissolved sulphate sulphuric acid present in final streams factory into minerals (melanterite FeSO4·7H2O, szomolno...
Concrete is part of a construction formed by mixture cement, water, fine aggregate, coarse aggregate either crushed stone or gravel and other mixed materials. Fiber concrete whose method manufacture added with fiber, both man-made fiber natural such as palm fruit bunches. The addition bunches to the mix expected increase compressive strength concrete. percentage marks 6%, 8% 11% weight cement...
The cementitious materials under consideration by Caltrans for rigid pavement construction may be classified into four categories: Portland cements and blends, calcium aluminate cements and blends, calcium sulfoaluminate cements, and fly ash-based cements. With the exception of Portland cements, most of the cementitious materials under consideration have not been extensively used for pavement c...
The work presented includes a review of the state art porous concrete. Its purpose is to evaluate potential use concrete in constructions where level surface runoff justifies it. A literature here has been necessary parameters special consideration have defined dosage permeable mixtures. study definition terms its main components: cement, coarse aggregate, water, additives, and sand, little or ...
Abstract Portland composite cement is a type of blended produced by the Indonesian factories where fly ash as one ingredient and production based on efforts to reduce CO 2 emissions in process. This research part sustainability infrastructure development which carried out through use cementitious material manufacture foam concrete. The purpose this paper was contribute understanding early age v...
As the manufacture of one ton Portland cement releases about CO2 into atmosphere, and since burning lime stone directly, industry is responsible for around 7% global emissions. In calcination process, calcium carbonate in limestone transformed oxide carbon dioxide. This step alone half industry's footprint. The use fossil fuels to heat kiln results indirect When these are used, they contribute ...
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