Editions – Built by Chemistry

Construction Chemicals Ed #15

Thixotropy is why the tile stays where you put it. The rheology behind the cream effect, the slip test, and why the datasheet lies at 35 °C.

Thixotropy is why a tile holds on a wall and spreads under the trowel. The rheology, the yield stress that carries the tile, and why datasheets lie at 35 °C.

Cement Ed #14

Concrete cover is a corrosion clock. Double the depth and you buy four times the years before the steel starts to go.

Concrete cover controls when chloride corrosion starts. Why doubling it quadruples the clock, what IS 456 requires, and how to read EN 1504 repair classes.

Building Envelope Ed #13

Two waterproofing systems on one basement wall. When the redundancy works, and when they fail together.

Crystalline admixture plus liquid membrane in a basement wall. When redundancy works, when both fail together, and the sequence that decides between them.

Building Envelope Ed #12

The flat roof that leaks at year three. Three real cases. One test nobody runs.

Three flat roof waterproofing failures: why the membrane passes EN 1928 but the seam and interface fail in 3 years, and the fixes procurement misses.

BIS Standards Ed #11

C2TE-S1: six characters, eight test methods, one classification most contractors cannot read

C2TE-S1 tile adhesive: what each letter means, when the S1 class is essential vs redundant, and why most Spanish and Indian pliegos still misuse it.

BIS Standards Ed #10

LC3 cement: -40% CO2, same compressive strength. India's cement industry doesn't use it. Here's why.

LC3 cement in India: what limestone-calcined-clay concrete actually is, where it already replaces OPC, and where the CCTS rules leave the market waiting.

BIS Standards Ed #9

Single buttering above 35×35 cm tile: TCNA, BS 5385, DIN 18157, UNE 138002

When single buttering stops working: the tile-size threshold that EN 12004-1 and IS 15477 set for double buttering, and why most pliegos miss it.

Construction Chemicals Ed #8

What construction chemicals datasheets don't tell you — and how to read between the rows

Every construction chemicals datasheet tells you what the manufacturer wants you to know. Five things they leave out — and how to spot them before you specify.

Cement Ed #7

Polymer prices up 60%. Naphtha up 74% in 14 days. Hormuz is rewriting construction chemicals.

Hormuz blockade and construction chemicals India: which RDP, cellulose ethers and dispersants get squeezed, and the sourcing pivots already underway.

BIS Standards Ed #6

70 metres of water. The hydrostatic head test India doesn’t require.

Hydrostatic head testing on basement membranes: what IS 3067 and DIN 18533 W2-E actually measure, and why site results do not match datasheet claims.

Building Envelope Ed #5

Waterproofing Failures Are Almost Never the Membrane's Fault

Waterproofing fails across India. Almost never because of the membrane. Three real failures, three real causes — Delhi to Rajasthan.

Mortar / AAC Ed #4

AAC blocks. Brick is losing.

Three weeks ago in Jaipur, AAC blocks went up twice as fast as a brick crew next door. The block won. The installation lost. Mortar chemistry decides.

Thermal Performance Ed #3

No insulation, no regulation: why India builds walls that fail in 5 years

20 mm of insulation where 50 mm is needed. ECBC applies to commercial, not residential. Same wall fails in 5 years across 28 Indian states — what to spec.

Waterproofing Ed #2

The wall on my morning drive has failed three times

Three repair attempts on the same wall. Three failures. The chemistry of why waterproofing keeps failing — and what the contractor kept getting wrong.

Tile Adhesive Technology Ed #1

Your tiles are lying to you

The hollow knock test, vitrified tiles, and why the cement mortar your contractor trusts creates a chemical bond closer to zero. What EN 12004 C2TE-S1 actually means in the field.

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