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  • 28 Jul 2017
    The mini-heatwave that settled upon many parts of the UK in June provided a welcome reminder that hot, sunny weather wasn’t necessarily the preserve of our compatriots across the continent. Sweltering temperatures, however pleasant they might be for camels or ice cream vendors, do not make ideal building conditions, particularly when it comes to concreting. For concrete to be placed and finished correctly, it needs to remain workable. In hot weather, moisture is drawn from the mixture more quickly, which can lead to it setting too rapidly for the user’s requirements. For instance, a 300mm-thick slab requires two loads of concrete to fill a mould. Timings are tight, and it’s not unknown for the first load to set before the second load is even delivered – particularly during hot weather. It only takes the second delivery load to be delayed by traffic, for example, for the process to fail. Fresh cement that’s poured onto an already-set and compacted base can lead to cold joints and unevenness. Fresh loads of cement should knit together to form one homogenous mass. For this to happen – concrete generates its own heat, so climatic conditions are only part of the hydration issue – it helps if the setting process is decelerated. Here’s where the availability of a product range such as Sikatard is such a huge benefit. Sikatard is an admixture in liquid form developed for the control of cement hydration. It coats the cement particles to prevent infusion and slow the drying-out process. This ensures the concrete mix is stabilised and prevents its setting for hours or even days. Sikatard, which conforms to the requirements of BS EN 934-2 Table 8, can also be used in steel reinforced concrete construction without restriction. Its stabilising properties ensure the distribution of stresses throughout the reinforcement encapsulated in the concrete isn’t compromised. Sika PilePak is another product proven to eliminate moisture escape from concrete. Its use during cast in situ concrete piling projects eases steel reinforcement fitting. Sika PilePak acts as a thickening agent which helps retain moisture within the concrete’s cement paste. It’s added to the concrete during batching then delivered to site. Dry or gravel-based ground absorbs water from cement like a sponge, making steel reinforcement insertion incredibly difficult, which could affect the concrete, and ultimately, the infrastructure’s stability. Sika PilePak ensures consistency and workability of the concrete over a prolonged period of time, helping avoid any concrete problems at any one pile position. With the government announcing a total of 250,000 new homes are needed annually to keep pace with demand, speed is key to developers helping fulfil this requirement without compromise to safety or quality. Thankfully, in Sika PilePak and the Sikatard range, the industry has the products with which to build a stable base to help meet our future housing needs – however hot the weather. By John Eustace, Product Manager at Sika  
    0 Posted by Talk. Build
  • The mini-heatwave that settled upon many parts of the UK in June provided a welcome reminder that hot, sunny weather wasn’t necessarily the preserve of our compatriots across the continent. Sweltering temperatures, however pleasant they might be for camels or ice cream vendors, do not make ideal building conditions, particularly when it comes to concreting. For concrete to be placed and finished correctly, it needs to remain workable. In hot weather, moisture is drawn from the mixture more quickly, which can lead to it setting too rapidly for the user’s requirements. For instance, a 300mm-thick slab requires two loads of concrete to fill a mould. Timings are tight, and it’s not unknown for the first load to set before the second load is even delivered – particularly during hot weather. It only takes the second delivery load to be delayed by traffic, for example, for the process to fail. Fresh cement that’s poured onto an already-set and compacted base can lead to cold joints and unevenness. Fresh loads of cement should knit together to form one homogenous mass. For this to happen – concrete generates its own heat, so climatic conditions are only part of the hydration issue – it helps if the setting process is decelerated. Here’s where the availability of a product range such as Sikatard is such a huge benefit. Sikatard is an admixture in liquid form developed for the control of cement hydration. It coats the cement particles to prevent infusion and slow the drying-out process. This ensures the concrete mix is stabilised and prevents its setting for hours or even days. Sikatard, which conforms to the requirements of BS EN 934-2 Table 8, can also be used in steel reinforced concrete construction without restriction. Its stabilising properties ensure the distribution of stresses throughout the reinforcement encapsulated in the concrete isn’t compromised. Sika PilePak is another product proven to eliminate moisture escape from concrete. Its use during cast in situ concrete piling projects eases steel reinforcement fitting. Sika PilePak acts as a thickening agent which helps retain moisture within the concrete’s cement paste. It’s added to the concrete during batching then delivered to site. Dry or gravel-based ground absorbs water from cement like a sponge, making steel reinforcement insertion incredibly difficult, which could affect the concrete, and ultimately, the infrastructure’s stability. Sika PilePak ensures consistency and workability of the concrete over a prolonged period of time, helping avoid any concrete problems at any one pile position. With the government announcing a total of 250,000 new homes are needed annually to keep pace with demand, speed is key to developers helping fulfil this requirement without compromise to safety or quality. Thankfully, in Sika PilePak and the Sikatard range, the industry has the products with which to build a stable base to help meet our future housing needs – however hot the weather. By John Eustace, Product Manager at Sika  
    Jul 28, 2017 0
  • 20 Jul 2017
    The mini-heatwave that settled upon many parts of the UK in June provided a welcome reminder that hot, sunny weather wasn’t necessarily the preserve of our compatriots across the continent. Sweltering temperatures, however pleasant they might be for camels or ice cream vendors, do not make ideal building conditions, particularly when it comes to concreting. For concrete to be placed and finished correctly, it needs to remain workable. In hot weather, moisture is drawn from the mixture more quickly, which can lead to it setting too rapidly for the user’s requirements. For instance, a 300mm-thick slab requires two loads of concrete to fill a mould. Timings are tight, and it’s not unknown for the first load to set before the second load is even delivered – particularly during hot weather. It only takes the second delivery load to be delayed by traffic, for example, for the process to fail. Fresh cement that’s poured onto an already-set and compacted base can lead to cold joints and unevenness. Fresh loads of cement should knit together to form one homogenous mass. For this to happen – concrete generates its own heat, so climatic conditions are only part of the hydration issue – it helps if the setting process is decelerated. Here’s where the availability of a product range such as Sikatard is such a huge benefit. Sikatard is an admixture in liquid form developed for the control of cement hydration. It coats the cement particles to prevent infusion and slow the drying-out process. This ensures the concrete mix is stabilised and prevents its setting for hours or even days. Sikatard, which conforms to the requirements of BS EN 934-2 Table 8, can also be used in steel reinforced concrete construction without restriction. Its stabilising properties ensure the distribution of stresses throughout the reinforcement encapsulated in the concrete isn’t compromised. Sika PilePak is another product proven to eliminate moisture escape from concrete. Its use during cast in situ concrete piling projects eases steel reinforcement fitting. Sika PilePak acts as a thickening agent which helps retain moisture within the concrete’s cement paste. It’s added to the concrete during batching then delivered to site. Dry or gravel-based ground absorbs water from cement like a sponge, making steel reinforcement insertion incredibly difficult, which could affect the concrete, and ultimately, the infrastructure’s stability. Sika PilePak ensures consistency and workability of the concrete over a prolonged period of time, helping avoid any concrete problems at any one pile position. With the government announcing a total of 250,000 new homes are needed annually to keep pace with demand, speed is key to developers helping fulfil this requirement without compromise to safety or quality. Thankfully, in Sika PilePak and the Sikatard range, the industry has the products with which to build a stable base to help meet our future housing needs – however hot the weather. By John Eustace, Product Manager at Sika
    0 Posted by Talk. Build
  • The mini-heatwave that settled upon many parts of the UK in June provided a welcome reminder that hot, sunny weather wasn’t necessarily the preserve of our compatriots across the continent. Sweltering temperatures, however pleasant they might be for camels or ice cream vendors, do not make ideal building conditions, particularly when it comes to concreting. For concrete to be placed and finished correctly, it needs to remain workable. In hot weather, moisture is drawn from the mixture more quickly, which can lead to it setting too rapidly for the user’s requirements. For instance, a 300mm-thick slab requires two loads of concrete to fill a mould. Timings are tight, and it’s not unknown for the first load to set before the second load is even delivered – particularly during hot weather. It only takes the second delivery load to be delayed by traffic, for example, for the process to fail. Fresh cement that’s poured onto an already-set and compacted base can lead to cold joints and unevenness. Fresh loads of cement should knit together to form one homogenous mass. For this to happen – concrete generates its own heat, so climatic conditions are only part of the hydration issue – it helps if the setting process is decelerated. Here’s where the availability of a product range such as Sikatard is such a huge benefit. Sikatard is an admixture in liquid form developed for the control of cement hydration. It coats the cement particles to prevent infusion and slow the drying-out process. This ensures the concrete mix is stabilised and prevents its setting for hours or even days. Sikatard, which conforms to the requirements of BS EN 934-2 Table 8, can also be used in steel reinforced concrete construction without restriction. Its stabilising properties ensure the distribution of stresses throughout the reinforcement encapsulated in the concrete isn’t compromised. Sika PilePak is another product proven to eliminate moisture escape from concrete. Its use during cast in situ concrete piling projects eases steel reinforcement fitting. Sika PilePak acts as a thickening agent which helps retain moisture within the concrete’s cement paste. It’s added to the concrete during batching then delivered to site. Dry or gravel-based ground absorbs water from cement like a sponge, making steel reinforcement insertion incredibly difficult, which could affect the concrete, and ultimately, the infrastructure’s stability. Sika PilePak ensures consistency and workability of the concrete over a prolonged period of time, helping avoid any concrete problems at any one pile position. With the government announcing a total of 250,000 new homes are needed annually to keep pace with demand, speed is key to developers helping fulfil this requirement without compromise to safety or quality. Thankfully, in Sika PilePak and the Sikatard range, the industry has the products with which to build a stable base to help meet our future housing needs – however hot the weather. By John Eustace, Product Manager at Sika
    Jul 20, 2017 0
  • 13 Jul 2017
    The seaside is known to do wonders for a person’s health, but it does nothing for the long-term wellbeing of buildings. The main cause of deterioration of reinforced concrete structures is the corrosion of embedded steel, particularly when exposed to chlorides found in sea water and airborne salts. This impacts on buildings within marine environments such as jetties, ports and bridges. Reinforced concrete structures are built to last and can generally expect to have a lifespan of about 50 years. However, in areas of chloride ingress the rate of corrosion increases, as does the need for repairs to maintain the buildings. Without professional treatment, a concrete’s surface can crack and spall. This is caused by passivating iron oxides, which protect the steel reinforcement, being destroyed by chlorides in air and water. The resulting surface debilitation could potentially weaken the structure and leave it vulnerable to serious deterioration – even collapse. This is particularly pertinent to public infrastructure such as bridges, which could be subject to lengthy and costly repairs funded by already cash-strapped local authorities. In such instances, people’s daily lives might also be severely disrupted.  The same applies to jetties, which serve vital aesthetic and operational purpose for marinas and nearly 100 sea ports across the UK. They also offer frontline sea defence, but bear the brunt of chloride’s invasive effects on account of being situated in tidal zones or splash areas. Sacrificial efficiency Sika was recently selected to supply a concrete repair and total corrosion management system (TCM) to the underside of a dockside quay that had displayed signs of corrosion due to chloride contamination. Sika® Galvashield®galvanic, sacrificial anodes, which are proven to provide long-term protection to high chloride environments, were installed as part of the refurbishment. The sacrificial anodes, comprising a zinc core encased in a small, cementitious shell, are installed within repair sites to prevent incipient anodes developing, or outside repaired sites to protect the reinforcement in chloride-infused concrete. Easily fastened to exposed steel reinforcement – or into cored and grouted holes in the concrete outside the repair site – the anode’s zinc core corrodes sacrificially to protect the surrounding rebar and prevent formation of new corrosion sites adjacent to repairs. This sacrificial zinc approach is similar to protecting oil rigs & hulls of ships. All-in-one solution As there is no need for an external power source, Sika’s galvanic systems are a popular choice for effective, low maintenance corrosion mitigation. Unlike other manufacturers, Sika provides repair materials and coatings as part of a total corrosion management package, because as well as supplying the anode, we provide repair materials and coatings. Once repairs have been carried out to all parties’ satisfaction, we will guarantee the repair system for up to 20 years – an offer unique to Sika. Galvanic anodes have revolutionised the treatment of chloride-contaminated concrete. It’s a system that is ingenious in its simplicity and effectiveness; eradicating the need for costly, time-inefficient and energy-consuming shot-blast methods of corrosion removal. The anode system is a smart 21st century solution to an age-old problem. It means our weathered, waterfront buildings can stand protected – ‘the seas shall not have them’. By Ronnie Turner, Infrastructure Manager - Refurbishment at Sika UK    
    0 Posted by Talk. Build
  • The seaside is known to do wonders for a person’s health, but it does nothing for the long-term wellbeing of buildings. The main cause of deterioration of reinforced concrete structures is the corrosion of embedded steel, particularly when exposed to chlorides found in sea water and airborne salts. This impacts on buildings within marine environments such as jetties, ports and bridges. Reinforced concrete structures are built to last and can generally expect to have a lifespan of about 50 years. However, in areas of chloride ingress the rate of corrosion increases, as does the need for repairs to maintain the buildings. Without professional treatment, a concrete’s surface can crack and spall. This is caused by passivating iron oxides, which protect the steel reinforcement, being destroyed by chlorides in air and water. The resulting surface debilitation could potentially weaken the structure and leave it vulnerable to serious deterioration – even collapse. This is particularly pertinent to public infrastructure such as bridges, which could be subject to lengthy and costly repairs funded by already cash-strapped local authorities. In such instances, people’s daily lives might also be severely disrupted.  The same applies to jetties, which serve vital aesthetic and operational purpose for marinas and nearly 100 sea ports across the UK. They also offer frontline sea defence, but bear the brunt of chloride’s invasive effects on account of being situated in tidal zones or splash areas. Sacrificial efficiency Sika was recently selected to supply a concrete repair and total corrosion management system (TCM) to the underside of a dockside quay that had displayed signs of corrosion due to chloride contamination. Sika® Galvashield®galvanic, sacrificial anodes, which are proven to provide long-term protection to high chloride environments, were installed as part of the refurbishment. The sacrificial anodes, comprising a zinc core encased in a small, cementitious shell, are installed within repair sites to prevent incipient anodes developing, or outside repaired sites to protect the reinforcement in chloride-infused concrete. Easily fastened to exposed steel reinforcement – or into cored and grouted holes in the concrete outside the repair site – the anode’s zinc core corrodes sacrificially to protect the surrounding rebar and prevent formation of new corrosion sites adjacent to repairs. This sacrificial zinc approach is similar to protecting oil rigs & hulls of ships. All-in-one solution As there is no need for an external power source, Sika’s galvanic systems are a popular choice for effective, low maintenance corrosion mitigation. Unlike other manufacturers, Sika provides repair materials and coatings as part of a total corrosion management package, because as well as supplying the anode, we provide repair materials and coatings. Once repairs have been carried out to all parties’ satisfaction, we will guarantee the repair system for up to 20 years – an offer unique to Sika. Galvanic anodes have revolutionised the treatment of chloride-contaminated concrete. It’s a system that is ingenious in its simplicity and effectiveness; eradicating the need for costly, time-inefficient and energy-consuming shot-blast methods of corrosion removal. The anode system is a smart 21st century solution to an age-old problem. It means our weathered, waterfront buildings can stand protected – ‘the seas shall not have them’. By Ronnie Turner, Infrastructure Manager - Refurbishment at Sika UK    
    Jul 13, 2017 0