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What are the Causes of Early-age Cracking in Concrete?

Early-age cracking is observed during the first seven days after concrete pouring. However, such cracks may also take more than a week to be visible in reinforced concrete slabs. Therefore, cracks appearing within 60 days after the concrete placement are considered early-age cracks.

The early-age cracks do not cause structural failure in concrete if the…
What is a Housewrap and Why is it Important?

Housewrap is a synthetic material used to wrap the exterior of a building to protect the wall frames from external moisture penetration. A housewrap is technically referred to as a water-resistant barrier (WRB), a lightweight sheet installed behind the siding and sheathing of the house. 

Figure-1: HousewrapsImage Credits: The Columbus Dispatch

Housewraps are expansive, quick…
5 Key Financial Ratios Used in Construction Business

Financial ratios are key parameters that help in understanding the financial health of a construction business clearly and effortlessly. They are a lifesaver when it is hard to determine the financial status of the company from a set of standard financial statements and documents.

Financial ratios give a quick and accurate indication of the company’s…
What is RevoColor?

RevoColor is a pigmented, textured, and cementitious coating suitable for both indoor and outdoor surfaces of various structural members in buildings, especially walls. It provides an organic and natural color and makes structures aesthetically pleasing.

The mixture of RevoColor is composed of four parts of RevoColor powder and one part of water. RevoColor functions as…
How to Manage Construction Backlogs?

A backlog in construction is categorized as prioritized work that needs to be completed or that has not started yet. The future projects a company has won bids for also come under the backlog category. 

Construction backlog is an indicator of a company’s financial health. It can be measured in terms of time or cash…
What is Internal Curing of Concrete?

“Internal curing refers to the process by which the hydration of cement occurs because of the availability of additional internal water that is not part of the mixing water”, as per ACI concrete terminology.

Internal curing helps the concrete to achieve its full potential in an economic and sustainable manner.

Internally cured concrete utilizes pre-wetted…
Effects of Unrepaired Early-age Cracking in Concrete Structures

Early-age cracking is a temporary shortcoming that crops up as a result of a faulty design and construction process. Such cracks can be repaired properly if necessary actions are taken on time.

They can lead to many non-structural and structural issues if not repaired properly, for instance, loss of aesthetic appearance of a concrete surface,…
How to Deal with Leaking Ceilings?

Ceiling leaks occur when the building space above the ceiling is inundated with water or moisture, finally penetrating the ceiling. Leaks are observed as discoloration or dripping water through the ceiling. 

Ceiling leaks indicate a faulty plumbing system or an improper rainwater drainage system of the rooms above.

This article discusses the possible ways to…
What is Relative Humidity of Concrete?

The relative humidity represents the amount of water vapor in the air compared to the amount that air can hold. 

Relative humidity in concrete is one of the critical parameters that should be considered before laying a floor. If concrete contains high relative humidity combined with excess moisture, it can cause floor failures and subsequently…
How to Choose Tiles for Construction of Pools?

Pool tiles are special tiles designed and manufactured to meet the durability, aesthetic, and maintenance requirements of wet outdoor environments. They not only improve the beauty of the pool but also affect its safety, durability, and maintenance requirements. 

Glazed Ceramic Pool Tile

The selection and laying of pool tiles are the two main activities involved…
Concrete Discoloration: Causes and Mitigation Strategies

Discoloration of concrete is a source of displeasure for both the contractor as well as the owner. It may appear as gross variations in color across large concrete surfaces, light or dark spots, or early light efflorescence. Many factors contribute to this issue, which is why it can be problematic and difficult to prevent.

What are the Causes of Foundation Heave?

Foundation heave is an upward movement of the foundation due to soaked expansive soil. 

The factors that lead to the saturation of soil beneath a foundation are seasonal changes in moisture, underground aquifer, or leakage in underground pipes. It is stated that financial losses due to heaving in the United States are larger than those…
What is Energy Performance Certificate (EPC) for Buildings?

Energy Performance Certificates (EPCs) are certificates that represent energy efficiency of buildings based on a rating from A (very efficient) to G (inefficient). The rating denotes the cost incurred for heating and lighting the property and the extent of carbon dioxide emissions.

Energy Efficiency Ratings on EPCs

The need for EPCs is emphasized in the…
What is Low-Noise Concrete Pavement?

Nowadays, controlling traffic noise has become an important criterion in the design and construction of transportation infrastructure. The noise pollution due to vehicular movements can be minimized through the construction of noise barriers or low-noise concrete pavement, with the latter being the most efficient method. 

Several techniques have been developed to reduce noise pollution, but…
How Does Internal Curing Affect Concrete Properties?

Internal curing is a technique that extends the hydration of Portland cement without increasing the initial water-cementitious material ratio.

The technique involves employing water stored in the saturated lightweight aggregate or superabsorbent polymer to cure concrete and help further with the hydration of cement. 

The lightweight aggregate is saturated before batching to absorb water in…
Types and Roles of Admixtures in Pumpable Concrete

Any admixture that improves the workability of concrete is advantageous for enhancing the pumpability of concrete. Various chemical admixtures like air-entraining admixture, high-range water-reducing admixture, and finely divided admixture have been utilized to improve concrete pumpability.

The choice of the type of chemical admixture and its utilization in concrete depends on the mixture’s characteristics. 

Ultra-Lightweight Concrete: Materials, Properties, and Applications

Ultra-lightweight concrete, which is also known as super lightweight concrete or infra-lightweight concrete, is a state-of-the-art concrete in terms of density and insulation properties and classifies as concrete with a dry density lesser than 800 Kg/m3. This density is the minimum limit for lightweight concrete according to the definition in standard EN 206-1.  

Ultra-lightweight concrete…
No-Slump Concrete: Workability and Proportioning of Mixture

As per ACI 116R-00, “No-slump concrete is a freshly mixed concrete that exhibits a slump of less than 25 mm”. Constituent materials of this type of concrete are similar to that of conventional concrete with the only difference being that no-slump concrete contains a greater quantity of aggregate.

The mix design of no-slump concrete should…
What are the Signs of Foundation Heave?

Foundation heave is the upward movement of the expansive soil layer after it is saturated with water. Controlling the signs and symptoms of foundation heave at an early stage is important to prevent further enlargement of heave pressure and avoid serious damage to the foundation and superstructure.

Common signs of foundation heave are cracked and…
How to Treat Discolored Concrete Surface?

Concrete discoloration is simply the change of the designated color of concrete. This could be due to the presence of calcium chloride in concrete, cement and additives, improper curing, environmental conditions, and faulty finishing works.

Discoloration can be minimized by reducing the effect of the factors mentioned above. However, if a contractor encounters dark spots,…