Physicomechanical Properties of Gypsum with Mineral …
Gypsum, from either nature or industrial by-products, can be a lower-cost and cleaner alternative binder to Portland cement used in construction projects, such as affordable housing in developing countries. ... In Proceedings of the International Scientific Conference on Socio-Technical Construction and Civil Engineering, Kazan, Russia, …
Constitutive Model of Swelling Gypsum Rock
Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of sidewalls during construction and operation. It is of practical significance to study the swelling mechanical behavior of such rocks by tests.
Experimental investigation into the effects of composition …
Gypsum has long been considered an important raw material for engineering construction. Based on its microstructure and component, gypsum rocks can be classified into several kinds.
Solved 500 kg of a gypsum rock is calcinated; and 320 kg of …
Engineering; Civil Engineering; Civil Engineering questions and answers; 500 kg of a gypsum rock is calcinated; and 320 kg of pure plaster of paris is obtained. Determine whether the gypsum rock is suitable for commercial use? (At least 70 % CaSO4.2H20 → OK!) (Ca: 40, 0:16, S: 32, H:1)
Applications of Recycled Gypsum from Waste Drywalls in …
Cristina H, Cordon F, Carvalho F, Furlan F (2019) Comparison of physical and mechanical properties of civil construction plaster and recycled waste gypsum from São Paulo, Brazil. J Build Eng 22:504–512.
Mechanical Damage Induced by the Water–Rock Reactions …
A comprehensive understanding and proper estimation of gypsum-bearing rock strength and deformation behaviors during water–rock reactions are of great …
Damage Evolution of Rocks under Triaxial Compressions: An …
To investigate the damage characteristics of rocks subjected to triaxial compression, marble specimens were prepared and subjected to varying levels of axial compressions with identical confining of 20 MPa. The loaded specimens were then tested using Nuclear Magnetic Resonance (NMR) technique to obtain their micro NMR …
Experimental Study on Physical and Mechanical Properties of Gypsum Rock …
In order to study the physical and mechanical properties of gypsum rock samples in three states (natural, high-temperature dehydration and hydration time), natural gypsum rock was put into high-temperature condition of 220°C for dehydration treatment, and then the high-temperature dehydrated gypsum rock was treated with different …
The aging of gypsum in underground mines | Semantic …
Advances in Civil Engineering. 2020; In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, … Expand. 17 [PDF] 1 Excerpt; Save.
Evaluation of engineering properties and
Semantic Scholar extracted view of "Evaluation of engineering properties and environmental effect of recycled gypsum stabilized soil in geotechnical engineering: A comprehensive review" by Shaoyun Pu et al. ... since it causes damage to civil engineering projects and has an impact on Ethiopia's road development …
Physical and Mechanical Properties of Gypsum-Like Rock …
If the understanding of gypsum rock is not clear, serious safety problems, such as roof fall, collapse, and other accidents, may problems. Therefore, it is very important to study the physical and mechanical properties of gypsum rock.
Physical and Mechanical Properties of Gypsum-Like Rock …
Abstract EN. In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, and other disasters, bringing serious challenges to the safe construction of the tunnel.
Gypsum as a Construction Material- A Review of Recent …
Gypsum, due to its unique property and pleasing appearance has made it the material of choice in the construction industry. Gypsum ... The engineering and physical properties especially the rigidity of the gypsum are mostly affected by the microstructure of the gypsum pastes after it is hardened. The Le chatellier's law clearly explains the ...
Effect of Water Content Variations on Critical and Failure Strains of Rock
Hazard warning levels criterion based on the critical strain concepts, which have been issued by Sakurai, is widely used in the stability assessment of tunnels. Many studies have been performed concerning the effect of the water content on the strength and deformability of rocks, but the effect of water content on the strain as the basis of some …
Physical and Mechanical Properties of Gypsum-Like Rock …
Although many scholars have carried out a series of research and discussion on the physical and mechanical properties of gypsum rock, the use of A-class α-high …
Nonlinear Viscoelastoplastic Fatigue Model for Natural Gypsum Rock …
To investigate its fatigue damage characteristics, natural gypsum rock was tested under multiple cyclic loading conditions. According to the fatigue test, a nonlinear viscoelastoplastic fatigue model was established by combining several fatigue elements to describe the fatigue process of gypsum rock based on the equivalent stress …
Constitutive Model of Swelling Gypsum Rock
Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of …
Lagging Collapse Mechanism of Gypsum-Mined Gob with Rock …
Furthermore, a creep model of the gypsum rock was established based on the creep experimental results. New FLAC numerical calculation models of gypsum-mined gob were established by inputting a creep model into the software for secondary development. ... Gypsum is an important and indispensable mineral in geotechnical and …
Gypsum-Concrete Decks
Contract conditions used for civil engineering work; Preparing contract documents; Tendering; The contractors site organization; The employer and his engineer; The resident engineers duties; ... Poured gypsum concrete is typically used in conjunction with steel bulb tees, formboards, and galvanized reinforcing mesh (Fig. 8.14). Drainage …
Plaster of Paris, uses, pros & cons
The Plaster of Paris is also called Parisian-plaster. The Paris-Plaster is made up of a quick set hemihydrate Calcium Sulfate (gypsum). Calcium Sulfate and water are known as Gypsum. Gypsum is a naturally occurring metamorphic rock, which is found in almost every country in the world. Calcium Sulfate naturally contains water in it.
Predicting mechanical properties and ultimate shear …
A new nonlinear Vipulanandan failure criterion was developed to quantify the tensile strength, pure shear (cohesion) strength and to predict the maximum shear …
What is drywall? Importance of drywall in civil construction
In the year 1936 US Gypsum Corporation trademarked ROCK-LATH (Rock Sheet) for their gypsum lath product. Manufacturing of a Drywall: A gypsum board or wallboard panel composed of a layer of gypsum plaster wrapped between two thin layers of paper.
Unit Weight of Construction Materials
Two-coat gypsum 12 mm thick: 0.215: Plasterboard 13 mm thick: 1.1: Gypsum panels 75 mm thick: 4.4: Clay hollow block: 0.0113 / mm thick: Common clay blocks: ... design, and construction of civil engineering infrastructures. He is a member of the Nigerian Society of Engineers. Reach him at [email protected]. RELATED …
gypsum rock in civil engineering
Characterization and modeling of longterm stress–strain . For gypsum rock with different gypsum contents, the parameter q ranged from 047 to 13, Nihad Bahaaldeen Salih obtained his BSc degree in Civil Engineering from Tikrit University, Iraq, in 1996 and MSc degree in Geotechnical Engineering from University of Technology, Baghdad, …
Geotechnical and Electrical Resistivity Properties of Gypsum …
Gypsum rich soils, mostly found in arid regions of the world are known to pose and number of geotechnical engineering hazards, the most common one being collapse settlement. In this research, the influence of gypsum content on the shear strength and collapsibility...
Contribution to the Formulation of a Material Based on
4.4 Formulation of a Material for Use in 3D in Civil Engineering. Mixing formulations of marble powder with other additives for 3D in civil engineering may vary depending on the properties desired for the final material. Some examples of possible formulations are: 80% marble powder and 20% gypsum. 70% …
Types of Stones used in the Construction
What are Stones? Stones are made up of two or more minerals that make up rocks, which make up the earth's crust and have no specific shape or chemical composition. In regions where it is naturally accessible, stones are one of the most significant building materials in stone masonry civil engineering. The stones used in...
Gypsum as a Construction Material-A Review of Recent …
Though gypsum has proved to be the best and cost effective construction material due to its excellent physical property, it has a number of limitations such as high permeable to …
Physical and Mechanical Properties of Gypsum-Like Rock …
In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, and other disasters, bringing serious challenges to the safe construction of the tunnel. ... Published in Advance in Civil Engineering 29 June 2020;
Influencing Factors for the Instability and Collapse Mode …
Advances in Civil Engineering. Volume 2021, Issue 1 5577287. Research Article. Open Access. ... Gypsum rock specimens were immersed in water for different amounts of time (1–120 days). The uniaxial compressive strength of the gypsum rock was then measured, and the strength-weakening rate was determined.