Products
All Products
- All
- Concrete Mixer
- Concrete Truck Mixer
- Concrete Pump
- Concrete Mixer With Pump
Reviews: 1
Aug 06, 2015· Following precautions should be taken during placing of concrete. The formwork or the surface which is to receive the fresh concrete should be properly cleaned, prepared and well watered. It is desirable to deposit concrete as near as practicable to its final position. The large quantities of concrete should not be deposited at a time.Estimated Reading Time: 2 mins
Jul 29, 2018· Do’s: Precautions to be Taken While Placing of Concrete. 01. Do hire an experienced Concrete contractor for successful concreting operation. Mixing of Concrete. 02. Also, see that the main/general contractor hire good skilled sub/labour contractor for concreting. 03. See that concreting is done under skilled supervision. Never leave it to labour on site.
The formwork or surface must be well cleaned, prepared and well watered in order to …
Do hire an experienced Concrete contractor for successful concreting operation.
Mar 05, 2019· In such concrete placement, before the concreting, the ground surface on which the concrete is placed must be free from loose earth and other organic matters such as grass, roots, leaves etc. The earth must be appropriately compacted and made sufficiently damp to prevent the absorption of water from concrete because it makes concrete weak.Estimated Reading Time: 11 mins
Precautions while placing and compacting concrete Don’t use a vibrator to move concrete horizontally. Don’t start a job without a spare vibrator. Concrete should not be over vibrated Stop vibrating concrete when the concrete surface takes on a shining appearance Stop vibrating concrete when larger air bubbles no longer escapeEstimated Reading Time: 5 mins
(b) The procedure of mixing, transporting, placing and compacting concrete should not take more than 90 minutes in any case. (c) No water shall be lost from the mix during transportation. (d) The concrete combine should be protected from drying in hot weather and from rain during transport from the place of mixing to the position of placing.
Mar 18, 2017· Compared with concrete without admixture, a concrete mixture that uses a water reducing and retarding admixture may have a higher rate of slump loss. Note: The number of the above listed precautions to be taken depends on the type of construction, temperature of the ambient air, low relative humidity, wind speed, concrete temperature and others.Working Safely With Concrete - Portland Cement Association
Apr 07, 2020· For example, an overexposure of wet concrete can result in many adverse health effects, and the following safety precautions should be taken seriously: To protect your skin and eyes, wear alkali-resistant gloves, long sleeves and long pants to keep skin covered, waterproof boots, and eye protection.
The following precautions should be taken while working during tremie concreting: Concrete should be consistent, rich in cement (not less than .) 370kg/m 3) and a drop between 150 and 180 mm. When concreting under water, a temporary cover should be installed to the full depth of the bore hole or 2 square meters In a non-collapsible layer so that pieces of ground do not fall …
By taking certain precautions, you can pour concrete in the winter. For concrete to set properly & harden, a chemical reaction called hydration (also known as the curing process) must take place, which consists of the chemicals in the concrete reacting with water to bind together the mixture. In order for hydration to occur, the temperature of ...
Mar 08, 2019· Knowledge about hot weather concreting provides guidance on the effects of hot weather conditions on the properties of concrete and the precautions that are to be taken to minimize any potential adverse effects when placing concrete and maintain the quality and durability of construction under such conditions.
Nov 05, 2012· Concrete that freezes before its compressive strength reaches the minimum of 500 psi shall be discarded. Suitable precautions shall be taken in cold weather to prevent concrete from freezing, including: • Heat the mixing water, but not >180 degrees F. • Avoid using frozen aggregates. • Heat the forms prior to and after casting.
There are many precautions in hot weather concreting such as: *The concrete can be scheduled to a time when the temperature is not high e.g. in summer it …
Precautions For Cold Weather Concreting: 1. Hot water (60 ° C) and aggregates (15 ° C) should be mixed before adding cement content in the mix.. 2. Concrete should be placed at a temperature of 4 °-5 ° C. After placing and compacting the temperature should be kept at 2 ° C until it becomes hardened.
Concrete should not be allowed to fall through water from any height. Water should not be pumped within 24 hours of placing concrete. Compaction of concrete should not be done until the concrete surfaces rise above the water level. The concrete mix should be rich by 10% to 30% of extra cement. concrete should not be placed in cold water.
Mar 18, 2017· The aim of good concrete placing can be stated quite simply. It is to get the concrete into position at a speed, and in a condition, that allow it to be compacted properly. To achieve proper placing following rules should be kept in mind: The concrete should be placed in uniform layers, not in large heaps or sloping layers.
Oct 24, 2014· Following precautions are to be taken while making use of mortar. Precautions to be taken while using mortar Consumption of Mortar. After preparation, the mortar should be consumed as early as possible. The lime mortar should be consumed within 36 hours after its preparation and it should be kept wet or damp.
1.2 When To Take Precautions During hot weather the most favourable temperature for achieving high quality freshly mixed concrete is usually lower than can be obtained without artificial cooling. A concrete temperature of 10°C to 15°C (50°F to 60°F) is desirable to maximize beneficial mix properties, but such
Aug 30, 2021· Staff member. Pune. Feb 25, 2018. #1. Precautions to be taken while removing Formwork / De-shuttering. When forms are stripped there must be no excessive deflection and no damage to the concrete due to the removal of supports or due to the stripping operations. Where stripping time is less than the specified curing time, provide adequate curing ...
Also read: Curing of Concrete & Creep of Concrete Precautions during Compaction of Concrete: Following precautions should be taken during compaction of concrete as follows: 1. Selection of the correct method of compaction according to the situation. 2. Avoiding segregation of concrete. 3. Avoid bleeding of concrete due to over compaction. 4.5 Mistakes to Avoid When Placing Concrete in Cold ... - …
By taking certain precautions, you can pour concrete in the winter. For concrete to set properly & harden, a chemical reaction called hydration (also known as the curing process) must take place, which consists of the chemicals in the …
Jul 15, 2020· Covering the Basics: With the summer months well under way, we can expect concrete pours to take place all over the Central Ohio Area. We all (should) know the required safety precautions to by which OSHA requires us …
May 31, 2021· A pumpable concrete requires good quality control; that is, it is uniform, has appropriately graded aggregate, and its materials are uniformly batched and mixed thoroughly. Site Planning and Precautions for Pumped Concrete. The following points must be taken care of by site personnel if successful pumping of concrete is to be achieved.
Precautions For Cold Weather Concreting: 1. Hot water (60 ° C) and aggregates (15 ° C) should be mixed before adding cement content in the mix.. 2. Concrete should be placed at a temperature of 4 °-5 ° C. After placing and compacting the temperature should be kept at 2 ° C until it becomes hardened.
Precautions: During the course of concreting no pumping of water should be done. If pumping is done simultaneously, it may suck the cement particles from the concrete. Method # 3. Bucket Placing Method: In this method the concrete is deposited under water by a …
12. Ensure that vertical drop of concrete while placing is not more than 1.5 metres at a time. If drop is more than 1.5 metre then chute shall be used for concreting. 13. Avoid concreting when temperature falls below 4.5 0 C and temperature of wet concrete goes over 38 0 C. 14.
Precautions Before Placing Concrete in the Cold. Tips for Placing Concrete in the Cold Time: 01:30 Guidelines for placing concrete in cold weather. ... Frozen ground—NEVER place concrete on frozen ground or onto ice or snow. There are a couple of problems with this. First, frozen ground will settle when it thaws, cracking the concrete.
Apr 14, 2020· 1) Control concrete temperature. AS 1379 requires that concrete temperatures at the point of delivery be within the range 5°C to 35°C. For high ambient temperatures, precautions need to be taken by the supplier to ensure that the concrete temperature at the point of delivery is within the allowable range.
Oct 08, 2019· Soldiers should be checked for its correct alignment and tightness to ensure concrete faces of wall comes out in straight line. View attachment 1941 This what i had precautionary majors to be taken while working at Project which uses Mivan Aluminium Formwork System. If you have any more points, you can add to it by replying to this thread.
🕑 Reading time: 1 minuteProper precautions for the storage of cement such as duration and place of storage, arrangement, atmospheric moisture content etc. is necessary after the process of manufacturing and before using it in the construction site. Because the cement hygroscopic nature, the cement absorbs moisture from the atmosphere very actively and hardens like […]
Adequate design precautions must be taken into account while designing. Multiple studies have shown that the external wall panel connections are the weakest points of a precast panel building. It is important to provide restraint to all load-bearing elements at the corners of the building.
Nov 23, 2019· Concrete . Formwork used and designed for cast-in-place concrete requires special considerations. Due to the significant weight that concrete adds to formwork and shoring equipment, it is important to check that eccentric loads are located over members that have been designed for such loading.
After work, remove iron filings and steel bars from tools, while do not use hands to wipe or blow with mouth. Well-cut steels and semi-finished products must be placed neatly according to their specifications. Other safety regulations. Electrical machinery should be taken measures to prevent rain, smashing, moisture and so forth.Precautions of Concreting | Concrete Technology
There are many precautions in hot weather concreting such as: *The concrete can be scheduled to a time when the temperature is not high e.g. in summer it …
12. Ensure that vertical drop of concrete while placing is not more than 1.5 metres at a time. If drop is more than 1.5 metre then chute shall be used for concreting. 13. Avoid concreting when temperature falls below 4.5 0 C and temperature of wet concrete goes over 38 0 C. 14.
Nov 15, 2020· Extreme cold weather conditions can significantly affect the quality of concrete, as well as its mechanical properties. In cold weather concreting, one should make sure that all the negative impacts of low ambient temperature are appropriately alleviated by taking the …
Jan 01, 2022· The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals …
In proper tremie placing, a closure is used to seal the pipe prior to placing the concrete. As the tremie is lowered to the bottom of the form, water pressure holds the plate tightly in position. Then the pipe and hopper are filled. The plate retaining wire is released if it is single, or withdrawn if it is double, and the tremie is raised ...
Jun 11, 2020· Hot weather concreting is any period of high temperature in which special precautions need to be taken to ensure proper handling, placing, finishing, and curing of concrete. The exact temperature where special precautions should be taken varies. According to Jack Holley, a concrete veteran of 45 years, 80°F (27°C) is a good benchmark to use.
Mar 18, 2017· The aim of good concrete placing can be stated quite simply. It is to get the concrete into position at a speed, and in a condition, that allow it to be compacted properly. To achieve proper placing following rules should be kept in mind: The concrete should be placed in uniform layers, not in large heaps or sloping layers.
Jun 21, 2020· Precautions to be Taken While Placing of Concrete | Do’s & Don’ts While Concreting Quality Control: The workability of the concrete will be continuously monitored at the delivery place before casting. Samples for conducting tests for determining the compressive strength on concrete will be taken according to the specifications.
Mixing and Transporting Concrete. 1.0 Introduction. The successful placement of concrete is dependent upon careful mixing, the proper equipment, and adequate transportation. This site will define, analyze, and demonstrate the importance of each in the overall process of placing concrete. 2.0 Batching and Mixing Concrete
1.2 When To Take Precautions During hot weather the most favourable temperature for achieving high quality freshly mixed concrete is usually lower than can be obtained without artificial cooling. A concrete temperature of 10°C to 15°C (50°F to 60°F) is desirable to maximize beneficial mix properties, but such
Jan 19, 2022· Pouring and Placing Tips. Additional practices during the pouring and placing can also help concrete set up and cure properly during cold weather: Make sure to arrange for crews to be on site for a longer period. Concrete exposed to cold temperatures will take more time to reach an initial set, which may mean that the finishing crew needs to be ...
Jul 16, 2014· The Occupational Safety and Health Administration (OSHA) has developed new educational resources and training for the construction and demolition industry. The administration notes that in late June a construction worker taking down an old Blockbuster Video building in New Jersey was trapped and killed when the last standing wall of a building under demolition …
Nov 13, 2018· Bracing anchors. Bracing anchors are used to connect the brace to the braced precast concrete element and the brace footing. They should be designed with a factor of safety of 2.5 against failure of concrete. If expansion anchors are used, capacity is based on a factor of safety of 2.5 against the first slip.
57th, Kexue Avenue, National HI-TECH Industrial Development Zone, Zhengzhou, China.
0086-371-86525099 (Office of the company)
0086-15136236223
E-mail : [email protected]
