Results 21 to 30 of about 319 (106)

Petrographic and Geotechnical Features of Dir Volcanics as Dimension Stone, Upper Dir, North Pakistan

Geosciences, 2023
The utilization of dimension stone in construction has been prevalent since ancient times; however, its application in modern construction has gained significant attention over the last few decades. This research aimed to assess the physical and strength
Muhammad Nawaz, Waqas Ahmed, Muhammad Yasir, Ihtisham Islam, Hammad Tariq Janjuhah, George Kontakiotis, Assimina Antonarakou, Christina Stouraiti   +7 more
doaj   +1 more source

A comparative study on the development of hybrid SSA-RF and PSO-RF models for predicting the uniaxial compressive strength of rocks

Case Studies in Construction Materials, 2023
In the field of rock engineering, uniaxial compressive strength (UCS) is a crucial mechanical parameter that cannot be ignored. Due to the difficulty in obtaining high-quality rock core samples in some projects, it is essential to develop a reliable UCS ...
Meng Wang, Guoyan Zhao, Weizhang Liang, Ning Wang   +3 more
doaj   +1 more source

Calibration and Reliability of the Rebound (Schmidt) Hammer Test [PDF]

Civil Engineering and Architecture, 2013
One of the most widely spread techniques to estimate the compressive strength of concrete is the rebound hammer test, also known as Schmidt Hammer test. In spite of a large number of scientific works trying to calibrate the test, to identify the parameters affecting its results and to estimate its reliability, the original Schmidt curve is still ...
BRENCICH, ANTONIO, CASSINI, GIANCARLO, PERA, DAVIDE, RIOTTO, GIUSEPPE   +3 more
openaire   +3 more sources

An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff

Remote Sensing, 2021
The mechanical strength is a fundamental characteristic of rock masses that can be empirically related to a number of properties and to the likelihood of instability phenomena.
Marco Loche, Gianvito Scaringi, Jan Blahůt, Maria Teresa Melis, Antonio Funedda, Stefania Da Pelo, Ivan Erbì, Giacomo Deiana, Mattia Alessio Meloni, Fabrizio Cocco   +9 more
doaj   +1 more source

Correlation Between Cerchar Abrasivity Index with Rock Properties in Sandstone and Tuff Samples [PDF]

Muhandisī-i manābi̒-i ma̒danī
The abrasivity of materials is of vital importance in selecting an affordable excavation method in the early stages of a tunneling project. The amount of specific energy and the Mode I and Mode II stress intensity factors in the eroded disc is more than ...
M. Hosseini, D. Fakhri, N. Behnam
doaj   +1 more source

Schmidt hammer exposure dating for brick masonry

Geochronometria, 2020
This research investigates the validity of the Schmidt hammer exposure dating (SHED) technique as a complementary means to date monuments according to the evaluation of the brick decay from masonry exposed to climatic conditions. The degree of surface weathering, I₅ (%) is calculated as an indicator of the ageing effect and ...
openaire   +1 more source

Prediksi Kuat Tekan Beton Agregat Recycled Campuran Air Laut dengan Schmidt Rebound Hammer Test

Rekayasa Sipil, 2023
Nowadays, using recyled aggregate and seawater as replacing natural aggregate and freshwater in mixing have been main priority to be a new concrete construction material.
Lusman Sulaiman, Ispianto, Muhammad Fahrizal Nur, Umar Hamzah Matottorang   +3 more
doaj   +1 more source

Performance prediction of roadheaders used in coal mines from the needle penetration index and the schmidt hammer value

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Coal mine galleries and construction tunnels are commonly excavated using roadheaders. Estimating the performance of roadheaders is crucial for planning and cost estimation when planning tunnel or tunnel projects.
Masoud Rostami, Sair Kahraman, Behnaz Dibavar, Mustafa Fener   +3 more
doaj   +1 more source

COMPARATIVE ANALYSIS AND EVALUATION OF THE CONVERSION FORMULA FOR REBOUND NUMBER OF SCHMIDT HAMMER TEST AND UNCONFINED COMPRESSIVE STRENGTH TEST – CASE STUDY: ANDESITE ROCK SLOPE IN GRAHA PUSPA, LEMBANG FAULT

Rudarsko-geološko-naftni Zbornik
The Unconfined Compressive Strength (UCS) test is one of the most common methods for determining the rock material strength value. However, the size and complexity of the instrument do not allow UCS testing to be carried out in the field.
Antonina Pri Martireni, Wira Cakrabuana, Koko Hermawan, Khori Sugianti, Arifan Jaya Syahbana, Sunarya Wibawa, Eko Soebowo, Adrin Tohari, Hasan Tri Atmojo   +8 more
doaj   +1 more source

HIGH SELECTIVE OIL SHALE MINING; pp. 305–325 [PDF]

Oil Shale, 2013
Several extraction technologies have been used for mining oil shale in Estonia. The quality and properties of the raw material for fuel and oil depend directly on the initial geological properties of the mineral resource.
VIVIKA VÄIZENE, Ingo Valgma, RIHO ISKÜL, MARGIT KOLATS, MARTIN NURME, VEIKO KARU   +5 more
doaj   +1 more source