Stone Crusher Research Articles

Analisis Perbandingan Kuat Tekan Beton Terhadap Penggunaan Pasir Alam Dan Pasir Pecah

The development of the construction industry in Indonesia is quite rapid, where almost all construction buildings use concrete as the main material. For certain areas or even at certain times where the natural conditions are not good (flood), it will be difficult to get sand. In this case, other alternatives are needed, not only from nature, for example from a stone crusher factory. In the Riau area there is a stone crusher factory, namely PT. Riau Mas Bersaudara where one of the products is crushed sand. The purpose of this study was to determine the ratio of the compressive strength of concrete resulting from the use of natural sand and crushed sand. In this study using the experimental method, namely the method by conducting experiments in the laboratory to get the results. The design concrete quality is K225 or equivalent to 18,675 MPa. Compressive strength testing based on SNI 1974:2011, the results of the study obtained that the average compressive strength at the age of 7 days of concrete with a mixture of natural sand was 17.625 MPa and concrete with a mixture of crushed sand was 13,841 MPa. From these results, it has been shown that the compressive strength of concrete using natural sand is higher than the compressive strength of concrete using crushed sand.

SAFETY RISK IDENTIFICATION AND ASSESSMENT IN THE STONE CRUSHER AREA AT PRAFI, MANOKWARI REGENCY, WEST PAPUA PROVINCE

Zero accident policy that proclaimed by the Government through the Ministry of Manpower and Transmigration must be implemented properly by all companies that operating in Indonesia. Zero accident can be accomplished by implemented Health and Safety in work (K3) and risk management in all companies, both small and large scale companies. The stone crusher company which operates in Prafi plain, Manokwari Regency, West Papua Province, is a high capital and high company with substantial assets, accidents might have happened during work projects. Assessment of the risk level of a stone crusher project can be done by conducting interviews, identification, observation and research to determine risk factors that may occur during work projects. The analysis shows that the stone crusher project has a low risk level (12%), moderate (39%) to high risk (49%). The high risk level percentage (49%) makes the stone crusher company obliged to carry out K3 management and risk control by involving K3 experts in every work project so that zero accident can be achieved.

Toward a framework for risk monitoring of complex engineering systems with online operational data: A deep learning-based solution

A mathematical architecture is developed for system-level condition monitoring. This architecture is built toward performing end-to-end operation risk and condition monitoring. The streaming monitoring data is given to the architecture as the input and system-level and component-level operation health states are computed as the output. This architecture integrates fault trees as the system-level modeling method and Deep Learning (DL) as the components condition monitoring method. A number of different deep learning models are trained using both operation and maintenance data for the components. Then, the fault tree fuses the continuous components’ assessments to provide system-level health insight. The applicability of this architecture is tested by implementing it on a real-world mining stone crusher system. This approach is extendable to dynamic risk assessment of complex engineering systems. However, DL models should be used with caution for safety-critical applications. We show that having DL models with high accuracy is not enough for trusting their predictions. We discuss the calibration of DL-based condition monitoring models and demonstrate how they can improve the trustworthiness and interpretability of DL models in risk and reliability applications.

PENGGUNAAN KERIKIL PECAH SUNGAI KAHAYAN SEBAGAI ALTERNATIF AGREGAT KASAR PADA CAMPURAN HOT ROLLED SHEET-BASE (HRS-BASE)

Lataston is a mixture commonly used in Indonesia as a pavement structure. In its implementation in the field, implementers are often faced with the high use of aggregate in the Lataston mixture due to limited resources of crushed stone in Central Kalimantan, which usually forms the aggregate in the Lataston mixture imported from outside the region. Gravel from Menen Paduran Village has various grain sizes between 5 mm to 75 mm but has a surface that tends to be round and does not have an angular surface so that the gravel must be crushed using a Stone Crusher in order to meet the characteristics of coarse aggregate in the Lataston base layer mixture. The goal of this research was to find out how the usage of crushed gravel from Manen Paduran Village as coarse aggregate in the Lataston base layer mixture on the Marshall characteristic stability value in the foundation layer Lataston mixture (HRS-Base). The research was carried out in two parts, the first of which was to collect data. was making the test object using crushed gravel. Manen Paduran as coarse aggregate, ex stone ash. Peacock and Tangkiling sand as fine aggregate to obtain Optimum Asphalt Content (KAO). In the second stage is to make the test object using crushed stone ex. Peacock as coarse aggregate, ex stone ash. From the results of these tests, a comparison was made between the use of crushed gravel ex. Manen Paduran and crushed stone ex. Peacock seen from Marshall characteristics. Marshall test results using crushed gravel obtained an optimum asphalt content of 6.85%, Marshall test results obtained that the stability value decreased by 8.8% from the use of ex crushed stone. Peacock and with the use of crushed gravel ex. Manen Paduran is only

Analisis kelayakan sumberdaya batuan sebagai peluang investasi stone crusher di dataran rendah Prafi

The Prafi/Arfak Lowland has potential rock resources to increase its local government revenue. Stone crusher is used by small-medium scale mining industry that supply raw materials of sands and rocks for infrastructure and road construction in Manokwari Region of West Papua. The method used consists of primary and secondary data collection as well as quantitative data analysis. This analysis aims to assess the feasibility of company’s stone crusher investment. Three main parameters were used in the assessment of investment feasibility, namely NPV (Net Present Value), DPP (Discounted Payback Period), and IRR (Internal Rate of Return). The analysis results reveal Net Present Value (NPV) of Rp. 57.068.789.003,49; Discounted Payback Period (DPP) for 2 (two) years and 11 (eleven) months and the Internal Rate of Return (IRR) of 40.22%. Based on the results of the three-parameter analysis, it can be stated that the investment made by the stone crusher company is considered feasible to run.

An eco-friendly approach on different industrial wastes for production of alternate walling materials

In present scenario, the use of conventional burnt clay bricks have increased tremendously due to rapid urbanization. In turn, use of conventional burnt bricks has lead to air pollution and loss of top good fertile soil. Secondly, generation of solid wastes from industries needs proper solid waste management. The studies have revealed that recycling of solid wastes will not only solve the problem of solid waste disposal but will also give alternate walling materials. This paper aims at an eco-friendly approach on different industrial wastes for production of alternate walling materials as they contain constituents suitable for their use as quality, cost-effective and appropriate alternative to conventional burnt bricks. The size of brick specimen is taken as 230 mm × 100 mm × 90 mm according to Indian standard for different mix proportions of industrial wastes and other conventional materials. The compressive strength, water absorption and density were studied for different mix proportions. The results show the variations in compressive strength and water absorption for different mixture proportions of different materials. From the present study we conclude that alternate walling materials from stone crusher dust, fly ash and red mud are more suitable and sustainable.

Study on the Behavior of Rigid Pavement Using Quarry Dust as a Partial Replacement of Sand and Sulfonated Naphthalene Formaldehyde (SNF) as an Admixture

Quarry dust is considered as a possible source of natural sand or fine aggregate in concrete construction work. This could reduce the problem of dumping of quarry dust as a byproduct from stone crusher factory. The experimental work investigates the optimum quarry dust percentage which can be adopted as replacement of fine aggregate in concrete mainly for rigid pavement. The quarry dust is added at different percentages of 0%, 20%, 40%, 60%, 80%, and 100% replacement of fine aggregate for M35 grade concrete thereby to find out the optimum content of quarry dust that can give better strength in concrete. Mix design has been developed for M35 grade of concrete as per IRC 044 – 2017(Mix Design for Concrete Pavement) and mix design ratio is found as 1: 1.6: 2.62 by using Sulfonated naphthalene formaldehyde (SNF) as an admixture at 1%, and 2%. The required water cement ratio was obtained as 0.39 according to table no.9 of IRC 044 for the target strength of 42.5 N/mm2. Optimum strength and workability test values of concrete made up for various proportions of quarry dust along with SNF are compared with conventional concrete of natural fine aggregate after 7 days and 28 days curing. It is found that the strength increased with the increase in curing time and the maximum strength at 28 days curing and 60% quarry dust replacement with 2% addition of SNF. The maximum strength of quarry replaced concrete is obtained as 40.3MPa, 5.6MPa, and 5.1MPa for compressive, flexural, and split tensile respectively.

FAHP ve TOPSIS kullanılarak yeni taş kırma makinesi ve katı atık sahası için en iyi yerin seçilmesi: bir bakır madeni örneği

This study presents a practical approach used to find the best location for installing a new stone crusher machine and the landfill (waste) in the Sarcheshmeh copper in-pit mine located in the southeast of Iran. Fuzzy analytical hierarchal process (FAHP) and technique for order preference by similarity to ideal solution (TOPSIS) are the two methods, which applied in the study as a part of multi-criteria decision making (MCDM) analysis. In the first part FAHP method was utilized to find the ideal location for the stone crusher machine, and in the next part TOPSIS (in combination with Shannon entropy weighting) was used in landfill selection. The analysis was performed using the data collected from experts (engineers, mine specialists, and managers). The North, South, East, and West sides of the mine were considered as potential alternatives, and 21 factors were considered as criteria for computational analysis. The obtained results from FAHP suggested that the best alternative was alternative 3 (East side of the mine) to place the new stone crusher machine. Considering solid waste management, the TOPSIS method demonstrated that alternative 1 (North side of the mine) was the best location to be considered for landfills. Finally, a sensitivity analysis was carried out to examine the effects of changes in weights of criteria on the obtained results.

Design and Performance Evaluation of a Stone Crusher

Crushers are essential machines in several industries for particle size reduction. They are invaluable in laboratories (higher institutions and research centres), the mining and construction industries. Available crushers are imported and very expensive. This has pushed some workers around Nigeria to crush stones with crude materials and manual labour, to meet the demand of the various sectors while neglecting the hazards involved. A hammer mill has been designed with due considerations to standard design requirements, local content and cost. The power required to crush granite with the desired through put of 400 kg/h was found to be 5.5 kW. Major factors considered for the material selection are the mechanical properties, wear of materials, fabrication requirement and cost. The machine was fabricated using locally available materials. The fabricated stone crusher was tested and the actual capacity was found to be 301 kg/h with a through-put efficiency of 75.4 %. The crushed products were well graded with 1.89 coefficient of gradation and uniformity coefficient of 10.22. The machine was produced at a cost of two hundred and forty-five thousand, two hundred naira (₦245,200.00 {US$595.15}).

Effect of Occupational Silica Exposure on Stone Crusher Workers

The Shankargarh town of Prayagraj district of Uttar Pradesh, India, is well known for its high quality silica sand and large scale surface mining. Evaluation of health of crusher workers was conducted in the stone crushers units of Shankargarh villages to access the silica dust exposure risk on stone crusher workers and nearby residents. These areas are covered with Granite and Silica sand. The various crushing operations involved in stone crushing e.g. blasting, manual cutting, crushing and transportation emit fugitive stone dust. These fine aerosol of stone dust causes health problems among the stone crusher workers. Health survey e.g. general clinical examination, blood sample test, sounds level measurement was carried out to access the extent of the damage caused to the workers.

PENERAPAN TEKNOLOGI TEPAT GUNA SEBAGAI PENINGKATAN KAPASITAS MESIN PENGAYAK PASIR TIPE ROTARY DAN USAHA DUSUN TANGGALAN, KABUPATEN KARANGANYAR

The increasing of infrastructure development causing in increased demand for sand material. On the other hand, the sand still contains many other components such as gravel. The size of good sand according to the Indonesian National Standard (SNI - 03-247-2002) is natural or artificial sand produced by the stone crusher industry with the largest grain size of 5 mm. On the other hand, the lack of infrastructure of the Tanggalan vilage and the small income of the village has resulted in an uneven distribution of the regional economy. Youths and heads of the Tanggalan village see the potential to increase the village's income by making sieving businesses and providing good quality building sand. The manual sieving process takes longer, so it has an impact on the development process as well as from an economic point of view on the long construction costs. So, it is necessary to have a rotary type automatic sieving machine that has a function to separate fine sand grains or according to the criteria requested by consumers with gravel. Rotary type sieving machine with a capacity of 10 m 3 /hour, so it is expected to meet the demand and accelerating development process. In addition, with this tool, hamlet businesses can be formed to increase hamlet income. Key words: Business, Enhancement, National Standard, Rotary, Sand Sieve.

Transformational Leadership Training: A Key Driver to Improve the Effectiveness and Productivity of CV Ning Sri Stone Crusher

Transformational Leadership Training: A Key Driver to Improve the Effectiveness and Productivity of CV Ning Sri Stone Crusher

Review of Pharmacological Properties and Chemical Constituents of Pastinaca sativa.

ObjectivesPastinaca sativa (parsnip), is a plant with nutritional and medicinal properties which has been used in all over the world and study about it is rare. In Persian Medicine parsnip is named as zardak and has many uses such as laxative, libido enhancer, kidney stone crusher and diuretic. Because the wide traditional usage of parsnip, in this review the composition and pharmacological properties of this plant are discussed.MethodsSome data base such as Cochrane, Scopus, PubMed were searched up to 2018 for studies about Pastinaca sativa. In this review study after consider to exclusion criteria, all of the English review and clinical trial were included.ResultsFinally, 46 articles were selected for extraction data about the parsnip. Data extraction based on these studies the most important active ingredients of parsnip include coumarins, furanocoumarins, polyacetylenes, essential oils and flavonoids. Different studies determined that Pastinaca sativa has pharmacological effects in CNS, respiratory, gastrointestinal, liver, skin, cardiovascular and urogenital diseases.ConclusionThe most important active ingredients in Pastinaca sativa are furanocoumarins, flavonoids and polyacetylenes, and it has many pharmacological properties, including anti-inflammatory, antispasmodic, vasodilator, antifungal, antimicrobial and antidepressant. A main mentioned side effect of parsnip is phototoxicity that was usually reported in direct skin contact. However, family and Some properties and compounds of Pastinaca sativa and Daucus carota are similar but carrots are very popular nowadays. Due to abundant active components and few clinical studies of parsnip, more Studies are recommended to evaluate the effects of it.

Clinico-Radiological Profile of Silicosis Patients Presenting at a Tertiary Care Centre of Haryana, India

Objectives: The aim of this study was to study the patients working in stone crushing units presenting with respiratory symptoms for occupational lung disease, silicosis. Patients and Methods: Over a span of 2 years, 176 consecutive new stone crusher workers diagnosed with silicosis were clinically evaluated, including radiological investigations, spirometry, and sputum for acid-fast bacilli. Results: All patients were male manual workers with average age and duration of stone dust exposure of 42.9 years and 20.11 years, respectively; 57 (32.3%) gave a history of smoking; 33% of patients had taken anti-tubercular treatment in the past. However, sputum of none of the patients was found positive for acid-fast bacilli. Only 4 (2.2%) patients mentioned the use of gloves and masks during work shifts. Breathlessness was the most common symptom (92%), followed by cough (61.9%), chest pain (48.3%), expectoration (6.8%), hemoptysis (5.7%), and wheezing (2.8%). Chest radiograms showed opacities-small (up to 10 mm, 57.95%) and large (>10 mm, 17.04%); pleural thickening (97.2%), diaphragmatic thickening (97.2%), and calcifications (71%) etc., Predominant lesions on high-resolution computerized tomography scan of the thorax were mediastinal lymphadenopathy (94.3%), round opacities (90.3%) followed by parenchymal bands (59.1%) and linear opacities (52.8%). On spirometry, 71 (40.3%) patients had findings within the normal limits. Conclusion: It is reiterated that silicosis has severe debilitating effects on the health of subjects, and the situation warrants continuous monitoring.

STRATEGI MENINGKATKAN DAYA SAING USAHA PT.X MELALUI RENCANA PEMBANGUNAN UNIT STONE CRUSHER BARU DI WILAYAH KABUPATEN PURWOREJO JAWA TENGAH

The smooth supply of broken stone will greatly affect and even determine the speed and accuracy of the completion of a project. The availability of large stones or blondos as raw material to produce broken stones must be guaranteed availability, for this reason it is very important to have a quarry or land containing blondos to maintain the continuity of raw material supply for the stone crusher business. Purworejo Regency has potential in terms of sand and stone mining. Most of the land consists of rock with a percentage of approximately 60% of the total area of Purworejo Regency. The type of raw material that is owned is andesite with a deposit of mining rock which can be exploited for mining for more than 20 years. Because of that potential, it is very important for PT. X to conduct a strategy analysis before constructing a new stone crusher unit. An appropriate business development strategy is needed. The purpose of this research is to create a business development strategy of PT.X by using the SWOT and TOPSIS methods. Based on the alternatives of the SWOT matrix obtained 8 strategies to develop the company and selected strategic priorities with TOPSIS found that market opportunities are very wide open and immediately expand the marketing network with a maximum value of 1.

Mechanical properties and absorption of lightweight concrete using lightweight aggregate from diatomaceous earth

Diatomaceous earth has a low density and this makes the material useful in producing lightweight aggregates. Therefore, this research was conducted to study the mechanical properties including the compressive strength, modulus of elasticity, splitting tensile strength, and flexural strength as well as the absorption of the lightweight concrete produced from the lightweight aggregates. Moreover, two methods were used to produce lightweight aggregates and the first was by burning diatomaceous earth chunks at a temperature of 650 °C and crushing them with a stone crusher while the second involved refining the material to make pellets after which it was burned at 650 °C. Two types of pellet were produced using diatomaceous earth only and with the addition of 5% sawdust due to the fact that the significance of this study was to utilize the diatomaceous earth as lightweight aggregates in lightweight concrete production. The lightweight concrete produced from the aggregates made using the first method had a density ranging between 1121 kg/m3 to 1181 kg/m3, however, based on its strength it can only be used as a non-structural element and an insulating material. Meanwhile, the concrete produced from the aggregate made using the second method as coarse aggregate and river sand as fine aggregate had a density of 1832 kg/m3 and based on its strength it can be classified as a lightweight structural concrete. Furthermore, the addition of 5% sawdust to the pellets had the ability to improve the mechanical properties, reduce the absorption, and decrease the density of the lightweight concrete.

Effect of demolished concrete and stone crusher dust on properties of M−40 grade paver blocks

Abstract Construction & demolition waste (C&DW) management is a major concern because of the rate of generation and associated environmental impacts. Utilization of stone crusher dust (SCD) is also a challenge for the stone crusher owners. So, this study utilized C&DW and SCD in paver block manufacturing. Mechanical & durability performance i.e. density, compressive strength, split tensile strength, water absorption, abrasion resistance & ultrasonic pulse velocity were evaluated. Results suggest that C&DW & SCD may replace up to 45% natural coarse aggregate & up to 100% river sand. This will produce cost effective concrete mix for paver blocks. Research findings may help government agencies to frame guidelines for effective utilization of C&DW and SCD.

GAMBARAN FAKTOR RISIKO TEKANAN DARAH SISTOLIK PADA PEKERJA TAMBANG BATU KAPUR DI KLAPANUNGGAL, BOGOR, JAWA BARAT

Hypertension is a disease that often lead to patient death as it does not have specific symptoms. The high prevalence in Bogor Regency caused by minimal health facilities, so there was no guarantee of occupational health for workers and the workers lack of knowledge. Objective: To determine the risk factors that affected systolic blood pressure in limestone miners in Klapanunggal. Method: Uses observational analytic study with cross sectional design with a total of 47 people. Result: The measurement of noise intensity are 83.2 dB on a breaker and 91.7 dB on a stone crusher. The average systolic blood pressure before and after work was 110.28 mmHg and 126.23 mmHg. The results of one-way ANOVA test, a correlation between noise intensity, working period, prolonged exposure, and smoking habits with systolic blood pressure with p=0.001 was obtained. According to dummy regression test, noise intensity were the most influential. Workers exposed to noise with an intensity normal had an average increase 10.45 mmHg, while those exposed to an intensity abnormal 22.27 mmHg. Conclusion: Noise intensity, working period, prolonged exposure, and smoking habits affect systolic blood pressure and the most influential factor was noise intensity.

Effect of compression refining on fiber properties

This article shows how fiber properties obtained by the compression refining of bleached softwood pulp refined using a KID 300 refiner differs from traditional bar refining. A KID refiner is a stone crusher that has been modified to refine fiber, and it offers a refining method that could be used at the mill scale. This study showed that compression refining caused more internal fibrillation compared with blade refining and improved the pulp’s ability to be beaten. Net energy consumption in compression refining was less than that of bar refining. Compression refining yielded pulp with shorter fibers and a higher number of fines, kinks, and curves. Still, the strength properties of the paper were the same level as bar-refined pulp, probably due to the higher internal fibrillation and flexibility of the fibers. It was also shown that the low field time-domain nuclear magnetic resonance (TD-NMR) method was capable of measuring the porosity and internal fibrillation of the fiber.

Study of Utilizations of Recycled LDPE Plastic and Stone Ash Waste from Remaining Split Stone Fragments for Block Paving Application

Several waste materials have been continuously investigated for possible use as substitutes for materials in the field of civil engineering; one of them is plastic waste, due to the fact that plastic waste is simultaneously increasing. In this study, the block paving was made from recycled plastic bag (LDPE) with the addition of stone ash from stone crusher process waste for the value of 0%; 2.5%, 5%, 7.5%, and 10%. These additions of stone ash were intended in order to increase water absorption and increase surface roughness. Several physical and mechanical tests were carried out according to SNI-03-0691-1996. From the compressive test, the highest compressive strength is 13.43 MPa. Based on the results of the sodium sulphate resistance test and the external appearance tests, it showed that all block paving was in good condition with solid surface. In accordance toSNI-03-0691-1996, the paving block was included in the class-C quality which can be used for pedestrians.