Procon 24/7’s Post

Why is the concrete steaming? Here’s a fun fact on this beautiful Friday: When freshly poured concrete steams on a cold morning, it's typically due to a combination of the exothermic reaction during the curing process. Here's how it works: During cold weather, concrete mixing temperature can be controlled using hot water so that when the concrete is placed, its temperature is not too low for the conditions and the application. The temperature limit for adding water to a mixture of cement and aggregates is 180°F when ambient temperatures are above 30°F. Therefore, on a cold morning, the air temperature is often much lower than the temperature of the concrete. As the warm concrete releases heat, it can cause the moisture in the air just above its surface to condense, creating visible steam or vapor. Are you fascinated by the science behind concrete? So are we! Whether it's a crisp morning pour or a massive foundation, our team at Cheek Construction is ready to deliver. Contact us TODAY: www.cheekconstruction.com . . #CheekConstruction #ConcreteOnDemand #concrete #flatwork #concretecontractor #NevadaContractor

Stream-curing of prestressed poles @Poles And Concrete Ltd. to achive 7-day concrete strength under conventional moist curing within 8 hours! Outline of Steam Curing Steam curing is a method for accelerated curing whereby concrete is cured in hot steam to obtain the required strength early. Concrete that has been subjected to steam curing is called steam-cured concrete. The initial strength of concrete is significantly influenced the maximum steam temperature and the temperature duration. The higher the maximum steam temperature, the earlier the concrete can be removed from the form and the larger the number of concrete production cycles (repetitions of forming and de-forming) per day. Generally, concrete plants produce ordinary-sized concrete products in 1.5 to 2 cycles/day and large-sized products in 1 cycle/day. The minimum strength required of concrete at the time of de-forming is 10–12 N/mm2 and 15 N/mm2 for ordinary- and large-sized products, respectively. In the case of a prestressed concrete product, the required strength is 35 N/mm2 or more because a prestress is introduced to it during de-forming. Therefore, many prestressed concrete products are made in 1 cycle/day. There are cases in which concrete products are shipped early when the required strength is obtained. Usually, however, concrete products are not shipped till they reach the age of 14 days (28 days for certain types of concrete products) #concrete #curing #steamcuring #psc #prestress #earlystrength #precast #civil

The mist rising off the fresh concrete shows it's a very cold night. But, this crew is prepared. Using proper cold-weather placement techniques and ordering the right concrete, they’re ensuring a strong, durable pour despite the chill. At Triangle Ready Mix, we know how to be your resource for concrete pours during cold weather. Our commitment to quality cold-weather concrete starts with heated mix water, available year-round to maintain proper curing temperatures. And with 100% generator backup, we can continue supplying heated mix water even during widespread power outages, keeping your projects on schedule no matter the conditions. We also provide precision-metered admixtures specifically designed for cold weather concreting. Our accelerators, available in both calcium chloride and non-chloride options, help speed up set times, reducing the risk of freezing and improving early strength development. Our water-reducing admixtures, including plasticizers and superplasticizers, enhance workability and strength while reducing the amount of water needed in the mix. Additionally, air-entraining admixtures create microscopic air pockets within the concrete, increasing durability and resistance to freeze-thaw cycles. Finally, our precision inline blending process ensures superior low-porosity concrete mixes, which means less permeability, increased strength, and enhanced resistance to harsh winter conditions. When the temperature drops, Triangle Ready Mix is "The Contractor's Choice" for concrete that performs! TriangleReadyMix.com #readymixconcrete #readymixedconcrete #thecontractorschoice

Finishing non-bleeding concrete What is meant by bleeding of concrete? Concrete bleeding, also known as water gain, is a process where water rises to the surface of freshly poured concrete. It happens when the solid components of the mix (cement, sand, and aggregate) begin to settle down after the concrete has been placed, leaving excess mixing water to rise to the top. When producing concrete, a producer never wants to hear the customer complaining that the concrete has excessive ‘bleed’. Bleed in concrete is the result of excess water being forced to the surface of the concrete. Understanding the cause of bleed can assist in properly managing and eliminating its occurrence. There are four primary ways to reduce the possible occurrence of concrete bleed: 1) Maintain a strict water to cement ratio; 2) Add sand; 3) Add Supplementary Cementous Materials (SCM’s) into your mix; 4) Add air entrainment to the mix… Happy construction team laughing together!!! Kabashi 2 Vellezerit e Bashkuar

Concrete strength isn’t solely determined by the amount of granite in the mix; it’s a combination of various factors including the quality of materials, proportions, and the curing process. However, utilizing less granite in concrete mixtures can still result in high strength if other high-quality aggregates and supplementary cementitious materials are used effectively. Here’s how: - Quality of Aggregates - Optimized Mix Design - Supplementary Cementitious Materials (SCMs) - Chemical Admixtures By employing these strategies in combination, it’s possible to produce high-strength concrete with reduced dependency on granite aggregates. This not only offers environmental benefits by reducing resource consumption but also provides engineers with greater flexibility in designing concrete mixes tailored to specific project requirements.

Concrete Shrinkage is a natural process that occurs as concrete dries and hardens. There are several factors that contribute to concrete shrinkage: Physical Factors: 1. Evaporation of Water: As water evaporates from the concrete surface, the concrete mixture loses volume, leading to shrinkage. 2. Hydration Reaction: The chemical reaction between cement and water releases heat and causes the concrete to shrink. 3. Settling of Particles: As the concrete mixture settles, the particles pack more closely together, reducing the overall volume. Chemical Factors: 1. Cement Paste Shrinkage: The cement paste, which is the mixture of cement, water, and air, shrinks as it hardens. 2. Aggregate Restraint: The aggregates (such as sand, gravel, or crushed stone) can restrain the shrinkage of the cement paste, but this restraint can also cause the concrete to shrink. Environmental Factors: 1. Temperature: Changes in temperature can cause the concrete to shrink or expand. 2. Humidity: Low humidity can accelerate evaporation and increase shrinkage. 3. Wind: Wind can increase evaporation and accelerate shrinkage. Other Factors: 1. Mix Design: The proportion of cement, water, and aggregates in the mix can affect the amount of shrinkage. 2. Curing Conditions: Inadequate curing can lead to increased shrinkage. 3. Age of Concrete: Shrinkage can occur over a long period, even after the concrete has hardened. Understanding the causes of concrete shrinkage is essential for minimizing its effects and ensuring the durability and structural integrity of concrete structures. #Concrete #Shrinkage #ConcreteShrinkage #CivilEngineering #Construction #RigidPavement #ConcreteRoad #ConcreteRoads #RigidPavements #ProfSRK #PavementDesign

LinkedIn Post Draft: Concrete quality depends on several critical factors such as Cement, Water, Aggregates, Batching, Transportation, Placing, Compaction, and Curing. The quality and quantity of each of these elements are essential for achieving durable and strong concrete. Types of Concrete Mix: 1️⃣ Nominal Mix: Prepared based on volume. For volumetric concrete mix, refer to IS 456, Clause 9, Table-9. 2️⃣ Design Mix: Prepared based on weight, following IS 456 and IS 10262. In this, “M” stands for Mix, and the accompanying number denotes the compressive strength (in MPa) achieved after 28 days for a 150mm cube. Understanding and implementing the right mix is crucial for delivering quality construction. Choose wisely between Nominal Mix and Design Mix to ensure strength, durability, and sustainability in your projects. For detailed guidance on Nominal Mix, watch my previous video. For an in-depth explanation of Concrete Mix Design, visit my YouTube channel. Mohit Sikri #civilengineer #concretemix #siteengineer #concretetips #civilengineering

In the fourth part of this series, we focus on the procedures involved in assigning spring supports to simulate a consistent soil modulus of subgrade reaction under the tank/pool slab. We distributed the soil stiffness to every node at the base of the slab using the method of joint springs. Although we could have used area springs utilising the concept of contact element for more realistic results, we will leave that topic for another presentation. In the meantime, here are some interesting questions to consider: -If this tank/pool structure was situated in a highly reactive soil, how would you model soil reactivity and the relative soil stiffness to evaluate differential movement? Would you consider using Mitchell or Walsh's slab on mound behavior? -What if there were varying depths to this tank/pool? How would you factor in the characteristic surface movement, considering that the soil cracking zone is reduced by the depth of the excavation at several locations under the slab? -Would you still consider an average change of suction at the ground surface of 1.2 Pf, as we do for residential slabs? -Would you model differential movement using a series of mound shapes rather than just one? What if we employed the method of coupled-flow deformation analysis? We could proactively adopt an idealised moisture-swell model for a particular site and then model soil reactivity by assessing the degree of saturation and resulting suction under the slab cover, rather than applying one mound shape with one soil stiffness value. What are your thoughts on this? -Depending on the soil reactivity and the weight of the structure, how would you design for uplift? Would you resist uplift by tying the tank/pool down with reinforced concrete piers tied back to the slab with 'L' bars? Or would you use screw piles with horizontal bars through the pile head? Alternatively, would you use a series of deepend stiffened beams? Hopefully, we can discuss all of these topics in the next series of presentations. Until then, I hope you have a great afternoon! https://lnkd.in/g35ArX4y

Sinking Concrete Slabs - Causes and Solutions https://hubs.li/Q02MbqvJ0

Its Concrete Facts Friday.................Let's do this!!! Have you ever wondered what makes Concrete so strong? Of course you have 😎 Concrete is so strong because of its tight, chemical bonds. Concrete is a composite material, comprised of cement paste, aggregates and water, and when combined, concrete cures. The main element that causes concrete to be so strong is the tricalcium silicate compound. ( Did you get that? 😎 ) What makes concrete so special? ( Besides the fact it has a Trade Show named after it 😁 ) Durability......... The unyielding nature of concrete makes it a durable, long-lasting material choice. It resists erosion, fire, rotting, rusting, and weathering with relative ease, requiring minimal maintenance and repair. Concrete boasts a lifespan that exceeds many other types of building material. Have a Great Friday & weekend my concrete friends. #woc2024 #concrete #worldofconcrete #worldofconcrete #concretepour #ConcreteFactsFriday #concreteconstruction #concreterepair #concretepump #concretetechnology #concretemixer #concreteindustry #concreteindustry #concretetools #informamarkets #concretecontractor #concretepour #concretelife #concretenation #thatconcreteguy #concreteequipment #thatconcreteguy