MENU
The study of the effects of granite dust on concrete performance focuses on two aspects. One is the cement replacement, and the other is the fine aggregate replacement. Elmoaty et al. [13] used granite dust (filtered by a 0.075-mm sieve) to replace cement by 5%, 7.5%, 10.0% and 15%. They found that the concrete compressive …
WhatsApp: +86 18221755073
2. Description of study area and sampling design. Obajana Cement plant is the largest cement factory in West Africa and is located in Obajana community on latitude 7.916°N and longitude 6.433°E of Kogi state, The plant is about 60 m away to the Onyi River which frequently receives discharges of effluent directly from the plant.
WhatsApp: +86 18221755073
Therefore, the aim of this review is to gather the potential toxic effects of cement dust and to minimize the health risks in cement mill workers by providing them with information …
WhatsApp: +86 18221755073
Several health conditions are associated with cement dust exposure; obstructive and restrictive lung disorders are the most common consequences. The …
WhatsApp: +86 18221755073
concrete, or construction rubble can generate respirable crystalline silica dust. When inhaled, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of airborne dust when using crushing machines as listed in Table 1 of the Respirable
WhatsApp: +86 18221755073
Cement Kiln Dust Introduction Cement kiln dust (CKD) is a by-product of cement manufacturing. It is a fine pow- ... Fig. 11.1 Effect of cement dust percentage on the compressive strength of concrete made by OPC (Shoaib et al., 2000) the age of 1, 3, and 6 months was 17%, 16%, and 13%, respectively. Generally,
WhatsApp: +86 18221755073
Cement is used in a variety of construction products. Most commonly it can be found in the production of concrete. Concrete is a mix of cement, water, and aggregates that can be found in nearly every construction project throughout the world.Whether you are mixing up a batch of concrete or repair mortar, or drilling, …
WhatsApp: +86 18221755073
The effect of chronic cement dust exposure on lung function of cement factory workers in Sokoto, Nigeria. Afr. J. Biomed. Res. 2007; 10 doi: 10.4314/ajbr.v10i2.50617. [Google Scholar] 12. Bazas T. Effects of occupational exposure to dust on the respiratory system of cement workers. Occup. Med. 1980; 30:31 ...
WhatsApp: +86 18221755073
Several health conditions are associated with cement dust exposure; obstructive and restrictive lung disorders are the most common consequences. The aims of this study were to assess the pulmonary function of cement factory workers and to determine the distribution of respiratory consequences resulting from dust inhalation. …
WhatsApp: +86 18221755073
casting 1.6.4 Compaction Three layers of mixed concrete were poured into the mold. Each layer of concrete was crushed with at least 25 strokes of a 25mm steel rod until complete compaction without ...
WhatsApp: +86 18221755073
an additive for a particular project. Cement clinker manu-facturing generates cement kiln dust (CKD) that must be disposed of properly. For instance, Iran produced nearly 75 million tonnes of various types of cement in 2021, with 8 million tonnes of by-product CKD mostly disposed of in landlls. CKD is gaining popularity as a construction
WhatsApp: +86 18221755073
7 Occupational exposure to cement dust might cause toxic effect on vital organs such as respiratory, renal and liver. 8 Cement is a dark grey colored powdery substance of aluminis, silica, lime ...
WhatsApp: +86 18221755073
Dust can be produced by almost all production processes in Portland cement factory. Dust exposure potentially can affect respiratory function. But evidence for respiratory effect of cement dust exposure has not been conclusive. In this study we assessed effect of cement dust exposure on respiratory …
WhatsApp: +86 18221755073
Destructive tests on concrete as a replacement of fine aggregates with stone quarry dust revealed that there is an upsurge of compressive resilience by 6.7% [11], 10.56% [12], 22% [13], 22.76% [14 ...
WhatsApp: +86 18221755073
The pulmonary and nonpulmonary effects of cement dust exposure in 52 randomly selected, directly exposed cement workers and 24 maintenance workers were investigated.
WhatsApp: +86 18221755073
Cement production in the world market is steadily increasing. In 2000, it was 1600 million tons, while as of 2013, the annual amount exceeded 4000 million tons. The burning of cement clinker is associated with the generation of waste. It is estimated that the amount of cement kiln dust (CKD), during combustion, reaches about 15–20%, which …
WhatsApp: +86 18221755073
The machine was turned off after 22 cycles, and the corundum powder was refreshed. The sample was rotated 90° clockwise. The disc and contact surface were cleaned each time, and the 2nd, 3rd, and 4th surfaces were abraded in this method, finishing the first stage after 88 cycles. ... Effect of cement kiln dust (CKD) on mortar …
WhatsApp: +86 18221755073
IJCBS, 24 (4) (2023):61-65 Sadek et al., 2023 61 Effect of Cement Dust Components on Human Health Eslam abdelfattah Sadek1*, Ahmed M. M. Hany2, Alaa Rashad3 1Department of Public Health and Community Medicine, Faculty of Medicine, South Valley University, Qena, Egypt. 2Department of Public Health and Community …
WhatsApp: +86 18221755073
Effect of demolished concrete and stone crusher dust on properties of M−40 grade paver blocks ... from the surface, paver blocks were tested for compressive strength with the help of compressive strength testing (CTM) machine and capping of the specimen ... F. Qais Abbas, Effect of recycled aggregate on interlocking concrete blocks for …
WhatsApp: +86 18221755073
The aim of this paper is to illuminate the impacts of cement production emissions on the environment. Various research work has shown that countries in sub-Saharan Africa, suffer the most from …
WhatsApp: +86 18221755073
Construction Dust Causes, Effects and Remedies Construction dust can seriously damage the health of construction workers and if exposed for longer times can eventually even kill them. About 22,000 to 52,000 …
WhatsApp: +86 18221755073
Objectives Based on findings from a systematic literature search, we present and discuss the evidence for an association between exposure to cement dust and non-malignant respiratory effects in cement production workers. Design and setting Systematic literature searches (MEDLINE and Embase) were performed. Outcomes were restricted to …
WhatsApp: +86 18221755073
Learn about the potential health and safety risks for workers in concrete manufacturing, such as cement dust, wet concrete, machine guarding, falling objects and more. Find …
WhatsApp: +86 18221755073
There are few longitudinal data, but recent studies report a dose-response relationship between cement production dust exposure and declining lung function …
WhatsApp: +86 18221755073
The Effects of Bit Wear on Respirable Silica Dust, Noise and Productivity: A Hammer Drill Bench Study ... A pilot study was performed to evaluate the effectiveness of water spray controls for a cold miling machine. Concrete - Grinding. 2004. The Efficacy of Local Exhaust Ventilation for Controlling Dust Exposures During Concrete Surface Grinding.
WhatsApp: +86 18221755073
Health Risks Associated with Concrete Dust Exposure. ... sneezing, and eye discomfort. Workers may experience a temporary increase in respiratory symptoms when exposed to high dust levels. Long-term Health Effects: Chronic exposure can lead to more severe health issues, such as chronic obstructive pulmonary disease (COPD), silicosis (a form …
WhatsApp: +86 18221755073
Concrete dust could have more potential to cause silicosis compared to cement, as it contains >30 wt.% crystalline silica, while cement dust contains mainly …
WhatsApp: +86 18221755073
Natural aggregates with three different gradings have been used to produce concretes with a constant water cement ratio of 0.5 and cement contents varying between 300 kg/m3 and 425 kg/m3. Aggregate gradings differed only in the dust (particles smaller than 300 μm) contents: Nil, 3%, 9%. Dust deficient aggregates always produced less …
WhatsApp: +86 18221755073
Background: Cement dust is one of the major air pollutants and its exposure causes various problems. It has deleterious effect on vital organs and may affect liver function.
WhatsApp: +86 18221755073
This may be caused by increased sensitivity of the airways related to long-term cement dust exposure in general or by hypersensitivity to specific components such as the trace amounts of chromium present in the cement dust, and might be a sign of chronic negative health effects. This should be evaluated further in future longitudinal …
WhatsApp: +86 18221755073Copyright © 2024 Sofol Industry & Technology Group Co., Ltd.
المنتجات
محلول
حول الولايات المتحدة
اتصل بنا