Construction is the backbone of modern society, responsible for building our homes, schools, hospitals, and the infrastructure that supports our everyday lives. It is a multidimensional industry encompassing various projects, each serving a unique purpose. Thus, with its economic, social, and technological significance, the construction ...
It is being used in different applications such as building material, agriculture, chemical and medical industry ... Performance Enhancement and Remediation of Micro cracks in Cement Mortar by Doping Calcite Precipitating Microorganism". Journal of Materials in Civil Engineering, ASCE, Volume 34-Issue 4- April 2022. doi: …
A wide variety of materials are used in the construction of roads these are soils (naturally occurring or processed), aggregates (fine aggregates or coarse aggregates obtained from rocks), binders like lime, bituminous materials, and cement, and miscellaneous materials used as admixtures for improved performance of roads under heavy loads and ...
The Ronaldsway calcite cement is divided into early stages 1 and 2 and later stages 3–8, despite coming from the same syntaxial crystals. The early stages 1 and 2 cement precipitated as Mg calcite from marine-like water; it precipitated rapidly, stabilised to a mixture of calcite and dolomite and was heated during burial.
Generally, for all the four types of construction stones, the values are well compacted around the mean at least until 400 °C. For granites and sandstones, even values at 900–1000 °C have a good level of confidence. 3. Thermal properties of construction stones at high temperatures.
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Building, 4 Brownlow Street, Liverpool, UK, L69 3GP 2EnQuest plc, Annan House, Palmerston Road, Aberdeen, AB11 5QP, UK R.H.W., 0000-0002-4686-9428 ... This localized calcite cement has led to relatively poor reservoir performance since first oil in 1978, although a
The paper presents the obtention and characterization of Portland cement mortars with limestone filler and nano-calcite additions. The nano-calcite was obtained by the injection of CO 2 in a nano-Ca(OH) 2 suspension. The resulted nano-CaCO 3 presents different morphologies, i.e., polyhedral and needle like crystals, depending on the initial …
Cement mortar cubes with dimensions of 50.8 × 50.8 × 50.8 mm (2 × 2 × 2 in.) were cast according to the ASTM [14] specification. A thin copper plate of 0.3 mm thickness was introduced in the fresh mortar paste up to a depth of 20 mm and length of 50 mm. Sand was injected into artificial cracks of cement mortar after 28 days curing at …
The overgrowth retains the same crystallographic continuity of quartz framework grain that is being cemented. However Opal cement often occurs in sandstones rich in volcanogenic materials, and very rarely is in other sandstones. Calcite cement is the most common carbonate cement. Calcite cement is an assortment of smaller calcite …
The usage of concrete is placed second after water, which is the main ingredient in the construction industry used either in roads, bridges, underwater, parking, and commercial or residential etc.; in which the amount of usage has been globally extended up to 4.08 billion tons [1].Due to concerns about energy saving and CO 2 …
India. Abstract: concrete is an absolutely leading component of construction material used in infrastructure and most building. This research given information about the aim at increasing the strength and total durability of the concrete this research carry out one some sate of concrete cube which are subjected to bacterial precipitation (MICP) by different …
Calcite cement Cc3 mainly precipitated in fractures with the same strike as F1 and F4 fracture sets in the north-western part of the anticline, from formation fluids that probably migrated through the frontal thrust of the south-eastern Pyrenees. During the continuous fold denudation, Cc4 precipitated from meteoric fluids in F1 to F4 fracture ...
Abstract. To accelerate the carbonation of lime, mortar samples were cured in chambers with high CO 2 concentration. Two types of lime mortar were prepared, which are similar to Roman mortar types: lime and standard sand (M1) and extra ceramic dust and fragments (M2). After demolding, half of the samples were placed in the climate …
Definition and Composition: Calcite is a carbonate mineral, which means it contains the carbonate ion (CO3^2-) as a fundamental building block. It is one of the most common minerals on Earth and can be found in various geological settings. Its name is derived from the Latin word "calx," which means lime, highlighting its close association …
Microbial-induced calcite precipitation (MICP) is a promising new technology in the area of Civil Engineering with potential to become a cost-effective, environmentally friendly and sustainable ...
All the three polymorphs of CaCO3 (calcite, vaterite and aragonite) were found on prolonged contact. with air of the hydrated powder (XRD, HRTEM). Their content wasRH=1.0fi dependent 0.95fi on sequence of RH condi-. tions on hydration: higher after water retention, WR, on lowering 0.5, than after water.
At the same time, it is important to convert CSRE to be a stronger, durable, and environment-friendly building material. Bacterial application is established to improve cemen … Biostimulation of calcite precipitation process by bacterial community in improving cement stabilized rammed earth as sustainable material
Properties and products of gypsum to be used as building material in construction works are discussed. Gypsum is used as surface materials. Its application is prominent in wall and ceiling construction. The use of …
Ordinary Portland cement (OPC) locally produced by Oman Cement Company (S.A.O.G) equivalent to Type I cement and conforming to Standard Specification for Portland Cement ASTM C150-22 [44] was used in all mortar mixes investigated in this study. Its chemical composition including main and trace elements are summarized in …
Many damaged earthen buildings are still in use worldwide, and they must be reinforced to meet current requirements. Reinforcement of the cement mortar overlay relies on bonding between the cement mortar and the adobe. The effects of surface roughness and coatings on bonding at the interface between the adobe and cement …
Cement mortar (CM) was formulated as sand to cement weight ratio of 3:1 at a constant water to cement (W/C) ratio of 0.47. The detail of mix-proportions is tabulated in Table 2.Firstly, the NMC-powder was suspended in the half of mixing water containing 1% (by weight of cement) water reducing agent then sonicated for 15 min to ensure …
MICP was first applied in the fields of rock and soil reinforcement, historic building restoration and other aspects [17][18][19][20][21], then used to repair cracks in mortar and concrete [11,16 ...
1. Introduction. Calcite cement is a significant factor controlling sandstone reservoir quality through reduction of porosity and permeability. However, when it starts to form during early stages of diagenesis, it provides a framework that may resist burial compaction and retains porosity until decarbonatization at greater depth (Hesse and …
The occurrence of ferroan calcite cement (CaCO 3 = 95.9 ± 0.4, MgCO 3 = 0.8 ± 0.1, FeCO 3 = 2.9 ± 0.2 mol%) is generally small, probably discontinuous and unlikely to represent significant barriers to fluid flow with their localized influence, but understanding their locally significant influence may still contribute to building good ...
DOI: 10.1016/j.conbuildmat.2022.126369 Corpus ID: 245885735; Comparing the effects of in-situ nano-calcite development and ex-situ nano-calcite addition on cement hydration @article{Monkman2022ComparingTE, title={Comparing the effects of in-situ nano-calcite development and ex-situ nano-calcite addition on cement hydration}, author={Sean …
Limestone is used directly as a building material and consumed in large quantities in industry too. Most applications require it to be burned to quicklime (CaO) at a temperature of at least 900 °C and if necessary converted with water to slaked lime (Ca(OH) 2) in an exothermic reaction in which a lot of heat is generated.Cement (Box …
Conventional reparation and maintenance method of mortars and buildings have adverse side effects on their surrounding environmental and aesthetic value. This study reported the impact of a locally isolated bacterium, Bacillus sp. strain SKC on the parameters affecting the properties of mortar. The abiotic control and bacteria-modified …
Cement mortar cubes with dimensions of 50.8 × 50.8 × 50.8 mm (2 × 2 × 2 in.) were cast according to the ASTM [Citation 14] specification. A thin copper plate of 0.3 mm thickness was introduced in the fresh mortar paste up to a depth of 20 mm and length of 50 mm. Sand was injected into artificial cracks of cement mortar after 28 days curing ...
Application of microbial biocementation to improve the physico-mechanical properties of cement mortar S.A. Abo-El-Enein a, A.H. Ali b, Fatma N. Talkhan c, H.A. Abdel-Gawwad b,* a Faculty of Science, Ain Shams University, Cairo, Egypt b Housing and Building National Research Center, Dokki, Egypt c National Research Center, Dokki, Egypt …
Study with Quizlet and memorize flashcards containing terms like The basic building blocks for halite are _____ and _____., Quartz is a mineral; granite is a rock., What element is the most abundant in the Earth's crust by weight? and more. ... calcite; cement. A naturally occurring concentration of one or more metallic minerals that can be ...
Concretions, with abundant calcite-dolomite cement-replacement textures originally hosted in shallow-marine sandstones, were reworked into Lower Cretaceous fluvio-deltaic conglomerates and shoreface sandstones (External Zones, Betic Cordillera). A cycle of host sand deposition, early diagenetic concretion formation and concretion …
Microscopic sections were cut out of macroscopic cement paste samples to observe the calcite precipitation. The sections were embedded in epoxy resin and polished in an alcohol-based solution using Struers Tegramin grinding plate with 1200, 2000, and 4000 grain/cm 2 grit under 5 N compression. Subsequently, a groove of 50 μm average …
0.25% and 0.50% of cement weight. Cement mortar mixtures was pre-pared, solidified, where treated samples and control were collected during the time course of 7–90 days. Small cubes from solidified mortar were homogenized, and 10 g were suspended in sterile saline solution (0.9 %v/v). Bacterial count was done using 10-folds …
Building Materials; Construction Engineering and Management; Engineering; ... Calcite cement within the cap dolostone yielded a U–Pb age of 636.5 ± 7.4/17.8 Ma (2σ, MSWD = 1.6, n = 36/40 ...
